Crassula ovata is, by a wide margin, the most widely cultivated species in the genus Crassula and one of the most popular succulent houseplants on Earth. Commonly known as the jade plant, money plant, money tree, lucky plant, or friendship tree, this evergreen succulent from the Crassulaceae family has earned a permanent place on windowsills, in conservatories, and in frost-free gardens across every inhabited continent. Its thick, glossy, oval leaves, its slow but sculptural growth, and its almost legendary tolerance for neglect make it a gateway plant for beginners and a lifelong companion for experienced growers. In favourable outdoor conditions, Crassula ovata develops into a sturdy, gnarled shrub that can exceed two metres in height and live for several decades — sometimes well over a century according to anecdotal reports.
Taxonomy and Naming History
Crassula ovata has had a turbulent nomenclatural journey. The plant was first formally described as Cotyledon ovata by Philip Miller in the eighth edition of his Gardener’s Dictionary in 1768. It was subsequently transferred to the genus Crassula by George Claridge Druce in 1917, in the Report of the Botanical Society and Exchange Club of the British Isles. The accepted name today is therefore Crassula ovata (Mill.) Druce.
Over the past two and a half centuries, the species has accumulated a long list of synonyms that still cause confusion in the nursery trade. The most frequently encountered are:
- Cotyledon ovata Mill. (1768) — the basionym
- Crassula argentea Thunb. (1778) — very common in older horticultural literature and still found on many commercial labels
- Crassula portulacea Lam. (1786)
- Crassula obliqua Aiton (1789) — sometimes treated as a distinct taxon but synonymised under Crassula ovata by POWO
- Crassula nitida Schönland (1903)
- Crassula lucens Gram (1941)
- Toelkenia ovata (Mill.) P.V.Heath (1993)
The nomenclatural authority used throughout this article is Plants of the World Online (POWO), maintained by the Royal Botanic Gardens, Kew, which currently lists 216 accepted species in the genus Crassula.
Etymology
The genus name Crassula derives from the Latin crassus, meaning “thick” or “fat” — a direct reference to the fleshy, succulent leaves that characterise the genus. The specific epithet ovata comes from the Latin for “egg-shaped”, describing the outline of the leaves.
The common name “jade plant” alludes to the rich, deep green colour of the foliage, reminiscent of jade stone. The names “money tree” and “money plant” are rooted in East Asian feng shui traditions, where the rounded, coin-like leaves are associated with prosperity and financial good fortune. “Friendship tree” reflects the widespread custom of offering rooted cuttings as gifts. In Afrikaans, the plant is known as kerky or plakkies; in Xhosa it is called umxhalagube.
Natural Habitat and Distribution
Crassula ovata is native to the eastern regions of South Africa, primarily the Eastern Cape and KwaZulu-Natal provinces, with its range extending northward into southern Mozambique (from the Manhiça district south of Maputo to Maputo itself). Within South Africa, the species is recorded from Willowmore in the west to East London on the coast, and northward to Queenstown and into the KwaZulu-Natal midlands. It is assessed as Least Concern (LC) on the IUCN Red List and is described as widespread and not declining by the South African National Biodiversity Institute (SANBI).
Vegetation type and ecology
Crassula ovata is a prominent component of the Albany Thicket biome — a unique vegetation type composed of dense, spiny, evergreen shrubland dominated by succulent trees and shrubs. It grows in subtropical valley thicket (historically called “valley bushveld”), on rocky hillsides and slopes, in sheltered ravines, and on the margins of open forest. Its typical companions include Portulacaria afra (spekboom), various Aloe and Euphorbia species, Schotia afra, Pappea capensis, and Lycium species. In the drier, more inland reaches of the river valleys (Bushmans, Kariega, Great Fish), Crassula ovata and Portulacaria afra become co-dominant, forming what is often called spekboomveld.
Altitudinal range spans from near sea level along the coast up to approximately 600–900 m inland, though it is most abundant below 500 m in the warm valley floors.
Climate across the natural range
The Albany Thicket biome occupies a climatically transitional zone between the winter-rainfall Western Cape and the summer-rainfall regions to the northeast. Rainfall is distributed throughout the year, typically with slight peaks in spring (October) and autumn (March–May), and a relatively drier summer period (December–February). This all-year rainfall regime, unusual in South Africa, is one of the defining characteristics of the thicket biome and distinguishes it sharply from the adjacent Karoo, grassland, and savanna biomes.
Rainfall. Mean annual precipitation across the natural range of Crassula ovata varies considerably depending on proximity to the coast and altitude. Coastal valley thickets near Gqeberha (Port Elizabeth) receive approximately 550–630 mm per year, distributed fairly evenly across the twelve months. Further inland, in the drier xeric thickets of the Fish River and Sundays River valleys, rainfall drops to 300–450 mm per year, with roughly 60% falling in summer and 40% in winter. Towards KwaZulu-Natal, where the range extends into subtropical thicket, annual totals increase to 700–950 mm with a stronger summer-rainfall peak.
Temperatures. The general climate within the core range is warm-temperate, with a mean annual temperature of approximately 17–18 °C. Summers are warm to hot: average daily maxima reach 26–32 °C between December and February in the inland valleys, and extreme maxima can exceed 40 °C during berg wind events (hot, dry foehn winds descending from the interior plateau). Coastal areas are moderated by the Indian Ocean and the warm Agulhas Current, with summer maxima typically capping at 25–28 °C.
Winters are mild by South African standards but not frost-free. Average daily minima in the coastal zone range from 7 to 10 °C in July (the coldest month), while inland valley floors can drop to 2–5 °C on clear winter nights. Frost occurrence is a critical ecological factor: the SANBI vegetation data report 0 to 64 mean frost days per year across the Albany Thicket biome, with frost being rare or absent at the coast and increasingly frequent inland and at higher elevation. Historical minimum temperatures in the inland Eastern Cape valleys can dip to –2 °C to –5 °C during exceptional cold spells, though such events are brief (a few hours around dawn) and the rapid daytime warming to 15–20 °C limits tissue damage in succulent species. The coastal populations of Crassula ovata near Gqeberha and East London essentially never experience frost.
Implications for cultivation. This climatic profile tells us that Crassula ovata evolved in an environment with moderate, year-round rainfall (not extreme aridity), warm summers, mild winters with only occasional and brief frost, and strong light for much of the year. This partly explains why the species, while drought-tolerant, is not as xerophytic as many Karoo or Namaqualand succulents, and why it responds so well to regular (but measured) watering in cultivation.
Botanical Description
Growth habit and stem
In habitat, Crassula ovata forms a well-branched, compact, rounded evergreen shrub typically 1 to 2.5 m tall, though old specimens can reach 3 m. In cultivation, indoor plants usually remain under 1 m without pruning, while outdoor specimens in mild climates can approach their wild dimensions over several decades. The trunk becomes stout and gnarled with age, developing a thick, somewhat corky bark that peels in horizontal brownish strips — an appealing feature that contributes to the plant’s bonsai-like aesthetic. The branches are short, thick, and succulent when young (green, matching the leaves in colour and texture), gradually becoming woody and grey-brown as they mature.
Leaves
The leaves are the defining ornamental feature: opposite, decussate (each pair at right angles to the pair below), oval to elliptic, 30–90 mm long and 18–40 mm wide, thick, fleshy, smooth, and glossy. The base colour is a rich jade green, though plants grown in strong light often develop a conspicuous red margin along the leaf edge, caused by the production of protective anthocyanin pigments. Under extreme light stress, the entire leaf may shift toward a yellowish or reddish hue as carotenoid pigments accumulate to shield the photosynthetic apparatus.
Like all members of the Crassulaceae, Crassula ovata uses Crassulacean Acid Metabolism (CAM), a photosynthetic pathway in which stomata open at night to absorb CO₂ and close during the day to minimise water loss. This physiological adaptation is central to the plant’s drought tolerance and its ability to thrive in the warm, semi-arid valleys of the Eastern Cape.
Flowers and pollination
Mature specimens produce terminal inflorescences in autumn and winter — typically from late April through June in the Southern Hemisphere, or October through December in the Northern Hemisphere. The inflorescence is a dense, rounded thyrse composed of numerous dichasia, roughly 5 cm in diameter, borne on a short peduncle. Individual flowers are small (approximately 15 mm across), star-shaped, with five fused sepals and five lanceolate petals that range from white to pale pink. They are sweetly scented and attract bees, wasps, flies, beetles, and butterflies as pollinators. Flowering in cultivation requires the plant to be mature (typically over 5–10 years old), exposed to bright light, and subjected to the temperature and day-length drop of autumn, which serves as the floral trigger. Plants kept in constant indoor conditions rarely flower.
Root system
The root system is relatively shallow and fibrous, reflecting the species’ natural habitat on thin, rocky soils over sandstone or mudstone substrates. This shallow rooting has practical consequences in cultivation: it means the plant does well in relatively shallow containers (a boon for bonsai), but it also means the root zone is particularly vulnerable to waterlogging and the resulting root rot.
Popular Cultivars and Varieties
The ornamental success of Crassula ovata has generated a remarkable number of cultivars over the decades. Some are well-documented clonal selections; others circulate under unstable commercial names that vary between nurseries and countries. The following are the most significant cultivars currently in wide circulation.
Crassula ovata ‘Hummel’s Sunset’ — A striking colour cultivar selected by the Hummel nursery in California. The leaves are flushed golden-yellow with red margins when grown in full sun, particularly vivid in autumn and winter. This cultivar has received the Royal Horticultural Society’s Award of Garden Merit (AGM). In lower light, the golden tones fade toward plain green.
Crassula ovata ‘Gollum’ — One of the most recognisable cultivars, named after the Tolkien character. The leaves are almost completely tubular (fused into a rolled cylinder), tipped with a reddish, concave suction-cup-like depression. This distinctive leaf morphology is thought to be caused by a mutation, possibly linked to a mycoplasma infection according to research by Roy Mottram of the International Crassulaceae Network. The cultivar tends to remain more compact than the type species.
Crassula ovata ‘Hobbit’ — Closely related to ‘Gollum’ and also named after Tolkien’s fiction. The leaves are curled back on themselves in a spoon or ear-like shape rather than fully tubular. The two cultivars are frequently confused in the trade, and some authorities group them under the informal “Tolkien Group”.
Crassula ovata ‘Variegata’ (syn. ‘Lemon & Lime’, ‘Tricolor’) — Chimeral cultivar with leaves striped in shades of cream, pale yellow, and green, sometimes with pink-tinged margins. Growth is slower than the type species due to reduced chlorophyll. Requires bright indirect light to maintain variegation without scorching.
Crassula ovata ‘Crosby’s Compact’ (syn. ‘Crosby’s Dwarf’, ‘Crosby’s Red’) — A dwarf form with smaller leaves (typically under 25 mm) that develop pronounced red margins even in moderate light. The compact habit makes it well suited to small containers and windowsill culture.
Crassula ovata ‘Skinny Fingers’ — An elongated leaf form where the leaves are narrower and more finger-like than the type, giving the plant a lighter, more open appearance.
Crassula ovata ‘Minima’ (syn. ‘Baby Jade’) — Another dwarf selection with proportionally smaller leaves and a compact, freely branching habit. Often sold as a beginner bonsai subject.
Crassula ovata ‘Undulata’ (syn. ‘Ripple Jade’) — Characterised by wavy, undulating leaf margins. The leaves are deep green and the overall habit is similar to the type species. Not to be confused with Crassula arborescens subsp. undulatifolia, which is a distinct taxon.
A note on commercial naming: the jade plant market is plagued by unstable, informal, or outright invented cultivar names. Names like ‘ET’s Fingers’, ‘Shrek’s Ears’, ‘Ogre Ears’, and ‘Lady Fingers’ circulate freely and often refer to plants that are indistinguishable from ‘Gollum’ or ‘Hobbit’. Buyers should rely on visual identification of the leaf form rather than trusting the label.
Cultivation Guide
Light requirements
Crassula ovata is a high-light plant that performs best with at least four to six hours of direct sunlight per day. In the wild, it grows in full sun to partial shade on hillsides and valley margins. Indoors, a south-facing or west-facing window is ideal in the Northern Hemisphere. Insufficient light produces etiolated, leggy growth with widely spaced internodes and pale, weak leaves — the single most common problem with jade plants grown indoors.
When moving a plant from lower light to full sun (for example, when transitioning an indoor plant to an outdoor summer position), acclimatisation over one to two weeks is essential to prevent sunscald. The opposite transition — from bright outdoor conditions to an indoor position in autumn — should also be gradual.
Strong light stimulates the production of anthocyanins and carotenoids, resulting in the attractive red-edged or bronzed foliage that many growers prize. Colour-enhanced cultivars like ‘Hummel’s Sunset’ and ‘Crosby’s Compact’ are particularly responsive to high-light exposure.
Temperature and hardiness
Crassula ovata is rated for USDA hardiness zones 10a to 11b for permanent outdoor cultivation, meaning it tolerates average annual minimum temperatures down to approximately –1 °C (30 °F). In practice, established plants in well-drained soil and sheltered positions can survive brief frost events down to –3 °C or even –4 °C, particularly if the substrate is dry at the time of the cold snap. Reports from Mediterranean-climate growers in southern France (Montpellier, Toulouse, Port-Vendres) and from collectors in New Zealand and the United Kingdom describe mature, well-established specimens enduring occasional lows of –4 °C to –6 °C against a south-facing wall without fatal damage, though leaf scorch and partial defoliation are common.
However, tolerance to cold is sharply affected by several variables: moisture content of the substrate (wet soil dramatically increases frost damage), duration of the cold event (a few hours at dawn versus a sustained overnight freeze), plant maturity (old, woody specimens are tougher than young, soft-stemmed plants), and cultivar (broad-leaved forms appear more frost-sensitive than compact, small-leaved cultivars according to collector observations). As a general rule, keeping the substrate dry and the plant sheltered (under an overhang, against a heated wall) extends survival by several degrees.
On the warm end, Crassula ovata handles summer heat well up to 35–38 °C with adequate airflow and soil moisture. Above 40 °C, physiological stress increases and growth slows.
For indoor culture, room temperatures of 18–24 °C during the growing season are ideal. A cooler winter rest period at 10–15 °C, combined with reduced watering, mimics natural conditions and promotes flowering.
Substrate
Drainage is the single most critical factor. Crassula ovata is highly susceptible to root rot in waterlogged conditions. A well-draining mineral-rich mix is essential. Effective formulations include:
- 50% mineral component (coarse pumice, perlite, or lava rock, particle size 3–6 mm) + 30% quality potting compost + 20% coarse sand
- Commercial cactus and succulent mixes, amended with 30–50% additional pumice or perlite for improved drainage
The target pH is slightly acidic to neutral (5.5–6.5). Avoid peat-heavy mixes that retain excessive moisture. Terracotta pots are preferable to plastic as they allow the substrate to dry more quickly between waterings.
Watering
The guiding principle is simple: water thoroughly, then allow the substrate to dry out almost completely before watering again. This “soak and dry” method mimics the irregular rainfall of the Eastern Cape thickets. During the active growing season (spring and summer), this typically means watering once every 7–14 days depending on pot size, temperature, and humidity. In winter, especially if the plant is kept in a cool room, watering can be reduced to once every three to four weeks or even less.
Overwatering is the number one killer of jade plants. The early symptom is soft, translucent, yellowish leaves at the base of the plant, followed by stem rot and root rot. Underwatering, by contrast, produces shrivelled, wrinkled leaves and eventual leaf drop — but the plant is far more forgiving of drought than of excess moisture. When in doubt, wait another few days before watering.
Fertilising
Crassula ovata has modest nutritional needs. A balanced liquid fertiliser (NPK 10-10-10 or similar), diluted to half the manufacturer’s recommended strength, applied once a month from mid-spring to early autumn is sufficient. No fertiliser should be applied during the winter rest period. Over-fertilising promotes soft, leggy growth that is more susceptible to pests and rot.
Repotting
Repot every two to four years in spring, using a pot only slightly larger than the previous one. Crassula ovata is tolerant of restricted root space and actually performs better in slightly root-bound conditions than in an oversized pot where the excess substrate retains moisture. When repotting, trim approximately 10% of the root mass, let the cuts callus for a day or two, then pot into fresh, dry substrate. Delay watering for five to seven days after repotting to allow cut roots to heal and reduce the risk of fungal infection.
For large, top-heavy specimens, choose a heavy terracotta or ceramic pot with a wide base for stability. The shallow root system means that relatively shallow containers are functional and aesthetically appropriate.
Pruning and shaping
Pruning is straightforward and well tolerated. Pinch or cut back growing tips to encourage branching and a compact, dense habit. Remove crossing or inward-growing branches to maintain airflow within the canopy. Major pruning is best done in spring or early summer when the plant can respond quickly with new growth. Cuttings removed during pruning can be propagated (see below).
The species responds well to trunk reduction: when a branch is cut back hard, new growth typically emerges from the wound area within one to two weeks. This vigorous regrowth makes Crassula ovata forgiving of even aggressive shaping.
Propagation
Crassula ovata is one of the easiest succulents to propagate. Three methods are commonly used.
Stem cuttings — the fastest and most reliable method. Take a healthy stem cutting 8–15 cm long, remove the lower leaves, allow the cut end to callus for two to five days in a dry, shaded location, then insert the cutting into slightly moist, well-draining substrate. Roots typically develop within two to four weeks. Spring and early summer yield the highest success rates.
Leaf cuttings — twist a healthy, plump leaf cleanly from the stem (ensure the base of the leaf is intact; a torn leaf will not root). Lay it on the surface of dry succulent mix. Within two to four weeks, tiny roots and a miniature rosette will appear at the base. This method is slower than stem cuttings and the resulting plant takes longer to reach a substantial size, but it is useful for mass propagation.
Seed — rarely used in amateur cultivation because seed is fine, difficult to handle, and germination is slow. Sow on the surface of a well-draining mix, do not cover, keep at around 20 °C, and maintain light moisture. Germination typically occurs in one to three weeks. Seedling growth is very slow for the first year.
In habitat, Crassula ovata reproduces vegetatively with remarkable efficiency: branches that break off and fall to the ground readily root, and even individual dropped leaves can establish new plants at the base of the parent — a strategy that enables rapid recovery after grazing or mechanical damage by animals.
Pests, Diseases, and Common Problems
Root and stem rot — by far the most common cause of death in cultivated jade plants. Caused by overwatering, poorly draining substrate, or a combination of both. Early signs include soft, translucent basal leaves, a mushy stem base, and a sour smell from the soil. Treatment involves removing the plant from the pot, cutting away all rotten tissue back to firm, healthy tissue, letting the cuts dry for several days, and repotting into completely fresh, dry substrate. Prevention is always preferable: water less, drain better.
Mealybugs — the most frequent arthropod pest. They appear as small, white, cottony masses at the leaf axils and along stems, feeding on sap. Isolated infestations can be treated by dabbing individual insects with a cotton bud soaked in isopropyl alcohol. Severe infestations may require repeated applications of insecticidal soap or neem oil. Inspect newly purchased plants carefully before introducing them to a collection.
Scale insects — small, flat, brown or grey armoured insects attached to stems and leaf undersides. They are harder to detect than mealybugs but cause similar sap-sucking damage. Physical removal with a soft brush or alcohol swab is effective for light infestations.
Spider mites — rarely a serious problem on Crassula ovata but can occur in very dry indoor environments with poor airflow. Fine webbing on leaf undersides is the telltale sign. Increase humidity and airflow; treat with isopropyl alcohol wipes rather than oil-based sprays, which can damage the waxy leaf cuticle.
Powdery mildew — a white, powdery fungal coating on leaves, favoured by high humidity combined with poor air circulation. Improve ventilation and reduce overhead watering. Fungicidal sprays are rarely necessary if cultural conditions are corrected.
Leaf drop — this is a symptom, not a disease, and requires differential diagnosis. The most common causes, in order of frequency, are: overwatering (soft, yellow leaves drop), underwatering (dry, wrinkled leaves drop), sudden temperature change (green, apparently healthy leaves drop), insufficient light (lower leaves drop progressively as the plant stretches toward the light source), and cold damage (leaves become translucent and mushy, then drop). Identifying the underlying cause is key to treatment.
Toxicity
Crassula ovata is listed as toxic to cats, dogs, and horses by the American Society for the Prevention of Cruelty to Animals (ASPCA). The toxic principle has not been definitively identified, though bufadienolides — toxic cardiac glycosides also found in other Crassulaceae including Kalanchoe — are suspected. Clinical signs in pets include vomiting, depression (lethargy), and loss of coordination (ataxia); in severe cases, a slow heart rate (bradycardia) has been reported. Symptoms typically appear within one to four hours of ingestion.
In humans, toxicity is considerably lower. Skin contact with the sap may cause mild irritation (itching or a burning sensation) in sensitive individuals, and ingestion of significant quantities could cause nausea and gastrointestinal upset, but serious poisoning is not documented. The Khoi people of South Africa traditionally consumed the cooked roots with thick milk and used a leaf decoction medicinally as a remedy for diarrhoea.
In practice, the risk to pets is real but often overstated online. The plant is not palatable and most animals ignore it after an initial exploratory nibble. Nonetheless, households with curious cats or puppies should place jade plants out of reach or choose a non-toxic alternative such as Haworthia or Echeveria.
Cultural Significance and Symbolism
Few succulents carry as much cultural baggage as the jade plant. In Chinese feng shui tradition, Crassula ovata is considered a powerful symbol of prosperity and good fortune. The rounded, coin-like leaves are believed to attract wealth energy (chi), and the plant is commonly placed near the entrance of homes and businesses — particularly at the southeast corner, which is associated with the wealth sector in classical feng shui.
In many Asian cultures, the jade plant is a traditional housewarming and New Year gift, meant to wish the recipient financial success. This symbolic association has spread globally and is a significant driver of commercial demand: “money tree” and “lucky plant” are among the most-searched terms associated with the species.
Beyond feng shui, Crassula ovata is culturally significant in its native South Africa. The Khoi people used the roots as food and the leaves as a traditional medicine. In Afrikaans-speaking communities, the plant is a common garden feature under the name kerky or plakkies.
The species has also become an icon of contemporary interior design, valued for its architectural, almost sculptural quality and its compatibility with minimalist, Scandinavian, and mid-century modern aesthetics. Its photogenic nature has made it one of the most-shared succulents on social media platforms.
Crassula ovata as Bonsai
The jade plant is one of the most popular subjects for succulent bonsai — and for good reason. Its thick, gnarled trunk, compact branching, small glossy leaves, shallow root system, and tolerance for root restriction and hard pruning make it almost tailor-made for bonsai culture. It is often recommended as the ideal first bonsai for beginners because it forgives mistakes that would kill a traditional bonsai species.
Suitable styles. Crassula ovata adapts to a wide range of bonsai styles: informal upright (moyogi) is the most natural and popular, but slanting (shakan), twin-trunk (sokan), clump, group planting, and even cascade and semi-cascade styles are achievable. The thick, succulent branches naturally droop under their own water-filled weight, which gives the tree a pleasingly aged, windswept character without much intervention.
Shaping. Most shaping is accomplished through clip-and-grow techniques rather than extensive wiring. When wiring is used, it should be applied loosely and for short periods (three to four weeks), as the soft bark marks easily and branches can snap if bent too aggressively. Allowing the plant to dry slightly before wiring reduces turgidity and makes branches less brittle. New growth appears rapidly after pruning — typically within one to two weeks — allowing the grower to direct development with frequent, light cuts rather than infrequent heavy interventions.
Leaf reduction. The natural leaf size of Crassula ovata (30–90 mm) is large relative to the scale of most bonsai. Consistent bright light, judicious watering (not overwatering), and regular pruning can reduce leaf size to approximately 12–15 mm in well-maintained specimens. Dwarf cultivars such as ‘Crosby’s Compact’ and ‘Minima’ start with smaller leaves, giving a head start on proportional aesthetics.
Trunk development. Building a thick trunk takes time — typically several years of unrestricted growth in a large pot or in the ground, followed by a hard chop and transition to a bonsai container. Patience during this development phase is critical; premature confinement to a small pot limits trunk thickening.
Display and care. In temperate climates, jade bonsai must be grown indoors or in a heated greenhouse during winter, as the species does not tolerate sustained frost. An outdoor position during the warm months (avoiding midday sun shock) promotes compact growth and vivid colouration. Watering discipline is paramount: overwatering in a shallow bonsai pot with reduced substrate volume is even more dangerous than in a standard container.
Crassula ovata Compared to Crassula arborescens
Crassula ovata and Crassula arborescens are the two most widely grown tree-forming Crassula species and are frequently confused by beginners. They can be distinguished by several features:
- Leaves: Crassula ovata has glossy, smooth, dark green leaves that are clearly oval. Crassula arborescens has almost round, blue-grey leaves with a distinct powdery waxy bloom (pruinose surface).
- Leaf margins: Crassula ovata often develops a thin red edge in strong light. Crassula arborescens has a more pronounced, darker red margin.
- Distribution: Crassula ovata occurs in the Eastern Cape and KwaZulu-Natal valley thickets. Crassula arborescens is restricted to the Little Karoo and Central Karoo — a completely different geographical area.
- Cultivation: Both species have similar cultural requirements, though Crassula arborescens is generally considered slightly more cold-sensitive and slower-growing.
Frequently Asked Questions
Why is my jade plant dropping leaves?
Leaf drop in Crassula ovata is most commonly caused by overwatering (leaves turn yellow and soft before falling), but it can also result from underwatering (leaves shrivel and wrinkle), sudden temperature changes, insufficient light, or cold damage. Check the soil moisture and recent environmental changes to identify the cause.
How fast does Crassula ovata grow?
Crassula ovata is a moderately slow grower. Under good conditions (bright light, appropriate watering, warm temperatures), a young plant can add 5–10 cm of height per year. Growth slows as the plant matures and as root space becomes limited. Indoor specimens are typically slower than outdoor ones due to lower light levels.
Is the jade plant toxic to cats?
Yes. The ASPCA lists Crassula ovata as toxic to cats, dogs, and horses. Ingestion can cause vomiting, lethargy, and loss of coordination. The toxic compound has not been definitively identified but is suspected to be a bufadienolide-type cardiac glycoside. Keep the plant out of reach of pets, or choose pet-safe succulents like Haworthia or Echeveria.
Can I grow Crassula ovata outdoors?
Crassula ovata can be grown outdoors year-round in USDA zones 10a to 11b, where minimum temperatures remain above approximately –1 °C. In zone 9b, it can survive in sheltered, dry positions against a south-facing wall with frost protection, but is best treated as a container plant that is brought under cover during cold spells. In colder zones, it is strictly a summer outdoor / winter indoor plant.
How do I get my jade plant to flower?
Flowering requires a mature plant (typically 5–10 years old at minimum), bright light during summer and autumn, and a cool period with shorter days and reduced watering in autumn to trigger bud formation. Plants kept in constant warm, evenly lit indoor conditions rarely flower because they never receive the environmental cues that initiate the bloom cycle.
Why are the leaves of my jade plant turning red?
Red-tinged leaf margins and overall reddish colouration are caused by anthocyanin and carotenoid pigments produced in response to high light exposure, temperature stress (especially cool nights), or slight water stress. This is not a sign of illness — it is a natural photoprotective response and is considered an attractive ornamental feature by many growers.
What is the difference between Crassula ovata ‘Gollum’ and ‘Hobbit’?
Both are leaf-shape mutations of Crassula ovata, sometimes grouped as the “Tolkien Group”. ‘Gollum’ has nearly tubular leaves tipped with a concave, suction-cup-like depression. ‘Hobbit’ has leaves that are curled inward on themselves, forming a spoon or ear-like shape, but are not fully tubular. Both are more compact than the type species. In the nursery trade, the two are frequently confused or mislabelled.
How long can a jade plant live?
Crassula ovata is exceptionally long-lived for a houseplant. Specimens of 50 to 70 years are well documented among collector communities, and anecdotal reports of plants exceeding 100 years exist, though they are difficult to verify. With consistent care, a jade plant can realistically be a multi-generational heirloom.
Sources and Further Reading
- Plants of the World Online (POWO), Royal Botanic Gardens, Kew — Crassula ovata (Mill.) Druce. powo.science.kew.org
- South African National Biodiversity Institute (SANBI), PlantZAfrica — Crassula ovata. pza.sanbi.org
- Hoare, D.B., Mucina, L., Rutherford, M.C., et al. (2006). Albany Thicket Biome. In: Mucina, L. & Rutherford, M.C. (eds.), The Vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. SANBI, Pretoria.
- Tölken, H.R. (1985). Crassulaceae. In: Leistner, O.A. (ed.), Flora of Southern Africa, Vol. 14. Botanical Research Institute, Pretoria.
- Eggli, U. (ed.) (2003). Illustrated Handbook of Succulent Plants: Crassulaceae. Springer, Berlin.
- Rowley, G.D. (2003). Crassula: A Grower’s Guide. Cactus & Co. Libri, Venegono Superiore.
- Court, D. (2010). Succulent Flora of Southern Africa. 3rd edition. Struik Nature, Cape Town.
- Roux, J.P. (2003). Flora of South Africa. Strelitzia 14. SANBI, Pretoria.
- ASPCA Animal Poison Control — Jade Plant. aspca.org
- Mottram, R. — “Crassula ovata Tolkien Group”. International Crassulaceae Network.
- University of Wisconsin–Madison Extension — Jade Plant, Crassula ovata. hort.extension.wisc.edu