Identity & taxonomy
- Scientific name
- Codiaeum variegatum (L.) Rumph. ex A.Juss.
- Family
- Euphorbiaceae
- Genus
- Codiaeum
- Order
- Malpighiales
- Croton variegatus L. (basionym; the genus Croton is now reserved for an unrelated group of Euphorbiaceae, but the trade name 'croton' has stuck for Codiaeum)
- Codiaeum pictum (Lodd.) Hook.
- Crotonen
- Garden crotonen
- Variegated crotonen
- Variegated laurelen
- Joseph's coaten
- Krotonsv
- Krotonno
- Krotonda
- Krotonifi
- Wunderstrauchde
Maluku Islands (Indonesia) · New Guinea · Northern Australia (Queensland) · Western Pacific islands
How to identify it
Growth habit. Upright multi-stemmed evergreen shrub. Indoor specimens are usually compact bushes; outdoor tropical specimens become small trees with woody trunks. Branches readily after pruning. Each cultivar has a distinct leaf shape — broad oval, narrow strap, twisted, or curled — but all share the multi-coloured foliage that defines the species.
Leaves. Leaves are alternately arranged, leathery, and glossy, ranging dramatically in shape across cultivars: broad oval ('Petra', 'Mrs Iceton'), narrow strap ('Andrew', 'Banana'), small speckled ('Gold Dust'), or twisted and curled ('Mammy'). Colouring shifts through green, yellow, orange, red, pink, and purple — often with multiple colours on the same leaf, and individual leaves changing colour as they mature. Brightest colour develops in high light; in dim conditions new leaves emerge plain green.
Flowers. Small inconspicuous yellow-white flowers in axillary racemes. Male and female flowers are produced on separate inflorescences. Indoor specimens almost never flower; the foliage is the entire ornamental value.
Fruit. Small dry capsules approximately 9 mm across containing three seeds. Not produced indoors.
- Leaves carry multiple colours (green, yellow, orange, red, sometimes pink or purple) — often on the same leaf — diagnostic for the species.
- Each cultivar has a distinct leaf shape, but all share the same colour palette.
- Stems and leaves bleed milky white latex when cut — an Euphorbiaceae trait shared with poinsettia.
- Leaf colour is light-dependent: in low light new leaves emerge plain green and the plant slowly loses its colour.
Commonly confused with
Chinese evergreen
Some Aglaonema cultivars (Red Siam, Pink Dalmatian) carry red and pink colouring superficially similar to a young croton, but Aglaonema leaves are softer, less leathery, with parallel veins; no latex sap on cut.
Copperleaf / Jacob's coat
Also Euphorbiaceae and also dramatically variegated, but leaves are toothed-margin and carry copper, bronze, and mottled patterns rather than the cleaner green-yellow-red of Codiaeum.
Caladium / angel wings
Heart-shaped leaves with red, pink, white, and green patterns, but Caladium leaves are thin and papery (not leathery), grow from a tuber rather than a woody stem, and die back annually.
Care
Light
Bright indirect to direct morning sun — high light is essential.
Place near a south, east, or west window — ideally in direct sun for 2–4 hours of the morning. Croton is one of the most light-hungry popular houseplants; insufficient light is the single most common cause of failure. New leaves emerging plain green or with washed-out colour signal that the plant needs more light. Direct midday summer sun through unfiltered glass can scorch leaves; a sheer curtain helps in summer.
Seasonal: Nordic apartments above ~55°N: a full-spectrum grow light for 10–12 hours/day from October through March is essentially mandatory to keep colour. Without it, expect the plant to slowly fade to plain green over the winter.
Water
Keep evenly moist; let the top 2 cm dry between waterings.
Water thoroughly until runoff and empty the saucer. Croton dislikes both extremes — drying out completely triggers immediate leaf drop, and constantly wet soil causes root rot. Aim for slow steady drying between waterings. Use tepid water; cold water from the tap can shock the roots.
Seasonal: Cut frequency by roughly a third from November to February but never let the rootball go bone-dry.
Soil
Well-drained peat-free potting mix with added perlite.
A mix of 3 parts quality peat-free potting soil to 1 part perlite gives the drainage Codiaeum needs. Slightly acidic pH suits the species; very alkaline tap water in hard-water regions can produce dull or chlorotic foliage over time.
Humidity
50–70 % preferred; tolerates 40 %.
Higher humidity dramatically reduces spider mite risk and keeps the colour vibrant. Croton is one of the more humidity-demanding popular houseplants; in the dry winter air of a Nordic heated apartment, a humidifier is highly recommended.
Seasonal: Spider mite outbreaks peak in winter when humidity drops; raise humidity preventatively in early autumn.
Temperature
18–27 °C; warmth-demanding.
Croton is more cold-sensitive than most popular houseplants. Brief exposure to 13–15 °C is tolerated; sustained cold below 13 °C produces dark patches and rapid leaf drop. Keep well away from cold window glass in winter and from air-conditioner output in summer.
Fertilizer
Balanced liquid feed monthly in spring and summer at half strength.
A balanced NPK (3-1-2 or 20-20-20) at half label rate. Croton benefits from slightly higher potassium to keep colour vibrant — a 3-1-3 or general flowering-plant feed works well. Overfeeding produces salt buildup and leaf-edge scorching.
Seasonal: No feeding from late October through February.
Pruning
Trim leggy stems in spring; cut just above a node.
Cut leggy stems back to 0.5–1 cm above a node with sharp clean scissors. The cut bleeds white latex sap for several minutes — wear gloves, since the sap is a known skin irritant and can stain clothing permanently. New side shoots emerge below the cut within 3–6 weeks. Croton tolerates moderate pruning but recovers more slowly than rubber plant.
Repotting
Every 2–3 years in early spring.
Move up by one pot size (3–5 cm wider). Croton dislikes root disturbance; minimise soil shake-out. Expect 2–4 weeks of leaf drop after repotting; this is normal.
Stem cutting in soil
moderate~5–10 weeksTake a 10–15 cm tip cutting with 3–4 leaves in spring. Let the cut end air-dry for 30–60 minutes to seal the latex (essential — fresh wet cuts root poorly). Dust with rooting hormone, plant in damp peat-free mix with added perlite, and cover loosely with a clear bag for the first 3 weeks to maintain high humidity. Bottom heat at 24–27 °C dramatically improves rooting success.
Stem cutting in water
moderate~6–12 weeksLess reliable than soil cuttings for Croton. Take a tip cutting, let the latex seal, then place in tepid water in bright indirect light. Change water weekly. Pot up once roots reach 4–5 cm.
Air layering
moderate~8–12 weeksUseful for salvaging a leggy specimen with a long bare lower stem. Wound the stem below the canopy, wrap in moist sphagnum sealed in plastic, and cut below the new root mass once roots fill the moss. The most reliable method for re-establishing tall croton specimens.
Cultivars
'Petra'
The most commonly sold cultivar: large oval leaves with bold green-yellow-orange-red veining and margins. Robust grower; the typical supermarket croton.
'Mammy' / 'Mamey'
Curled and twisted leaves with red, orange, yellow, and green colouring. Compact growth, strikingly different leaf shape from 'Petra'.
'Gold Dust'
Small narrow green leaves heavily speckled with golden-yellow spots. Compact bushy habit; easier to keep than the larger-leaved cultivars.
'Andrew'
Narrow elongated leaves with bold yellow-and-green stripes. Distinctive but light-demanding to keep the yellow stable.
'Mrs Iceton'
Broad leaves that mature from yellow through orange to deep pink-red. Among the most colour-changing cultivars; a lighting and stress sensor as much as a houseplant.
'Banana'
Long narrow yellow-and-green leaves resembling small banana leaves. Compact form; one of the more architectural cultivars.
Common problems
Massive leaf drop on arrival
Symptom
Most or all leaves yellow and drop within 1–2 weeks of bringing the plant home or moving it to a new position.
Cause
Acclimation shock combined with the plant's high light requirements. Croton drops leaves dramatically in response to any environmental change — a move from a bright greenhouse to a dimmer home is the most common trigger.
Fix
Place in the brightest non-scorching spot available. Maintain consistent watering (top 2 cm dry between waterings). Do not move again. New leaves emerge from bare branches within 6–10 weeks if the new position has adequate light. The plant typically recovers fully if not moved repeatedly during the stress period.
Full guide: Why Is My New Plant Dropping Leaves? A Diagnostic GuideNew leaves emerging plain green
Symptom
New foliage lacks the bright multi-colour pattern, emerging as solid mid-green or with very washed-out colour.
Cause
Insufficient light. Codiaeum colour is entirely light-dependent; in dim conditions the plant produces plain green leaves to maximise photosynthesis.
Fix
Move to the brightest available position — direct morning sun is ideal. Add a full-spectrum grow light for 10–12 hours/day, especially in Nordic winters. Existing green leaves do not regain colour; new growth in better light will emerge with the proper variegation within 2–3 leaf cycles.
Full guide: Why Is My Variegated Plant Losing Its Variegation?Stippled leaves and fine webbing
Symptom
Pale stippling on the upper leaf surface, fine silk webbing under the leaves, leaves dull and dropping.
Cause
Spider mites. Codiaeum is among the most spider-mite-prone popular houseplants, particularly in dry winter air.
Fix
Rinse the plant thoroughly under a tepid shower, paying attention to leaf undersides. Treat with insecticidal soap or diluted neem oil weekly for 3 weeks. Raise humidity above 50 %. For severe infestations, take healthy cuttings and discard the parent plant.
Full guide: Spider Mites on Houseplants: Identify Webbing, Damage, and How to Kill ThemLeggy stems with bare lower sections
Symptom
Long sparse stems with leaves only at the tips; bare lengths of stem in between.
Cause
Insufficient light combined with no pruning. Croton stretches toward light and drops shaded lower leaves.
Fix
Move to brighter light. Hard prune leggy stems back to 20–30 cm above the soil in spring; new side shoots emerge below the cut within 3–6 weeks. Use the cut tops as cuttings.
Full guide: Why Is My Plant Leggy? Causes of Stretching and How to Fix ItLatex sap on skin or fabric
Symptom
Pruning or accidental damage releases milky white sap that causes skin irritation and stains fabric.
Cause
Codiaeum is in Euphorbiaceae — the same family as poinsettia and pencil cactus. The latex sap contains diterpene esters that are known skin irritants.
Fix
Wear gloves when pruning. Wash skin contact with soap and water immediately. The sap stains fabric permanently once dry — protect clothing before cutting. Eye contact should be flushed with copious water and treated as a medical concern.
- Spider mites (the dominant Croton pest)
- Mealybugs
- Scale
- Thrips
- Root rot (Pythium, Phytophthora)
- Anthracnose leaf spot
- Bacterial leaf spot
Toxicity & safety
Skin contact with sap causes contact dermatitis in most people — Codiaeum is a documented contact allergen. Eye contact causes severe irritation. Ingestion of leaves or seeds produces oral burning, vomiting, abdominal pain, and diarrhoea. Seeds are the most toxic part — historic poisonings have been reported.
Mechanism: Diterpene esters (5-deoxyingenol family), 12-deoxyphorbol esters; classified as moderately co-carcinogenic in animal studies.
Codiaeum variegatum — Missouri Botanical Garden Plant FinderVomiting, drooling, oral irritation, and diarrhoea. The latex sap is also a contact irritant on skin and lips.
Mechanism: Diterpene esters from the latex sap.
Croton — ASPCA Toxic and Non-Toxic PlantsVomiting, drooling, oral irritation, and diarrhoea. Latex contact with skin causes inflammation.
Mechanism: Diterpene esters from the latex sap.
Croton — ASPCA Toxic and Non-Toxic PlantsWhy your croton drops leaves the moment you bring it home
Codiaeum variegatum is famous for shedding most of its leaves within 1–2 weeks of arriving from the nursery. The mechanism is a combination of acclimation shock — the same response seen in Ficus benjamina — and the plant's unusually high light requirements. A croton produced in a bright commercial greenhouse and then placed in a typical home interior is suddenly experiencing perhaps a tenth of the light it was used to. Each leaf was metabolically optimised for the brighter environment; in lower light those leaves are no longer profitable, and the plant sheds them.
The recovery path is straightforward but requires patience. Place the plant in the brightest non-scorching position available — ideally a south or east window with direct morning sun. Maintain consistent watering (top 2 cm dry between waterings). Do not move it again. New leaves matched to the new light environment will emerge from the bare branches within 6–10 weeks. If the new position genuinely has adequate light, the plant recovers fully. If not, recovery stalls and is the signal to add a grow light or move closer to the window.
Why colour fades in low light — and how to bring it back
Codiaeum's spectacular colour is produced by the interaction of chlorophyll (green), carotenoids (yellow, orange), and anthocyanins (red, pink, purple) in cells controlled by light intensity. In high light, the plant produces less chlorophyll and proportionally more carotenoids and anthocyanins, revealing the bright reds, oranges, and yellows that make croton famous. In low light, chlorophyll dominates as the plant maximises photosynthesis — and new leaves emerge plain or muted green.
Existing leaves cannot be re-coloured: the chlorophyll-to-pigment ratio is fixed at the time the leaf is produced. But new leaves grown in better light will emerge with the proper variegation, and the plant gradually transitions back to its bright form over 2–3 leaf cycles. The single most reliable upgrade in Nordic apartments is a full-spectrum LED grow light running 10–12 hours/day from October to March — colour that previously faded each winter holds year-round under good supplemental lighting.
Despite the trade name, Codiaeum variegatum is not a true Croton — the genus Croton (which contains around 1,200 species, including the medicinal Croton tiglium that gave the world croton oil as a violent purgative) is a separate group within Euphorbiaceae. Codiaeum and Croton share a family but split from a common ancestor tens of millions of years ago. The mix-up dates to Linnaeus, who originally described Codiaeum variegatum as Croton variegatus in 1753; the reclassification came in 1832, but the trade kept the old name and almost everyone outside taxonomic botany still calls the plant 'croton'.
Frequently asked · 5
Is croton (Codiaeum variegatum) toxic to cats and dogs?+
Yes — ASPCA lists croton as toxic to cats and dogs. All parts contain diterpene ester compounds in the latex sap, which cause vomiting, drooling, oral irritation, diarrhoea, and contact dermatitis on skin and lips. The species is in the Euphorbiaceae family, alongside other latex-containing toxic houseplants like poinsettia and pencil cactus. Keep cuttings, pruned material, and dropped leaves out of pet reach.
Why is my croton dropping leaves?+
Most often acclimation shock — Codiaeum drops leaves dramatically in response to any environmental change. Common triggers: the plant just arrived from the nursery, was repotted, was moved to a new room, experienced a sudden temperature drop, or the soil was allowed to dry out completely. The fix: stabilise position with bright light, maintain consistent watering (top 2 cm dry between waterings), and do not move again. New leaves emerge within 6–10 weeks. The single biggest mistake is moving it again to find a 'better' spot.
Why aren't my croton leaves colourful anymore?+
Insufficient light. Codiaeum's colour is entirely light-dependent — in dim conditions the plant produces plain green leaves to maximise photosynthesis. Existing leaves cannot regain colour, but new leaves grown in better light will emerge with the proper variegation. Move to the brightest available position (direct morning sun is ideal), add a full-spectrum grow light for 10–12 hours/day in Nordic winters, and expect colour to return within 2–3 leaf cycles.
Why does my croton keep getting spider mites?+
Codiaeum is among the most spider-mite-prone popular houseplants, particularly in the dry warm air of a heated indoor environment. Prevention: keep humidity above 50 %, rinse leaves under a tepid shower every 2–3 weeks in winter, and wipe leaves clean monthly. Treatment: weekly insecticidal soap or neem oil for 3 weeks. For severe outbreaks, take healthy cuttings (after letting the latex seal) and discard the parent plant — eggs in deep leaf folds frequently survive treatment and re-infest.
How do I propagate a croton?+
Stem cuttings root in damp soil within 5–10 weeks. Take a 10–15 cm tip cutting in spring, let the cut end air-dry for 30–60 minutes (essential — the latex must seal or the cutting rots), dust with rooting hormone, plant in damp peat-free mix with added perlite, and cover loosely with a clear bag for the first 3 weeks to maintain high humidity. Bottom heat at 24–27 °C dramatically improves success. Air layering is the most reliable method for tall leggy specimens — wound the stem, wrap in damp sphagnum sealed in plastic, and cut below the new root mass once roots fill the moss.