Houseplant · Euphorbiaceae
Croton
Codiaeum variegatum
Give it bright light and steady, humid warmth, and the croton sets a room ablaze with leaves in red, orange, and gold.
Bright indirect
50–85°F · 10–29°C
USDA 11–12
2–8 ft · 0.6–2.4 m
Overview
Croton wins people over on its leaves alone, splashed with red, orange, yellow, and green in patterns no two plants quite repeat. The plant behind the name is Codiaeum variegatum, a woody evergreen from the spurge family that grows wild from Malesia into the southwest Pacific. Indoors it builds into a bold, leathery-leaved shrub that climbs past head height as it matures, and that growth is half the fun of keeping one.
Light is the engine that drives a croton's color. Park it in a bright spot with a little direct sun and the shades catch fire, but leave it in a dim corner and the new leaves slide back toward plain green. It thrives on the warmth and humidity of its tropical roots, and it pushes back when you keep moving it, often dropping a flush of leaves after a relocation or a cold draft.
Yes, it wants some attention, but it pays you back fast once it settles into a rhythm. Keep it warm, water when the top of the soil dries, and keep the milky sap off your skin and away from pets, since every part of the plant is an irritant.
Care
The short version: bright light with some direct sun to fire up the color, warmth above 50°F (10°C), high humidity, and water only when the top half-inch to inch of soil dries.
Light
Light fuels a croton, and the more it soaks up the brighter the leaves blaze. Chase bright indirect light with some direct sun, since a dim spot bleeds the color back to green. Harsh, all-day sun can scorch the leaves gray, though, so filtered or shifting sun hits the sweet spot.
Water
Water when the top half-inch to one inch of soil dries, soak it well, and let the excess drain. Pull back in winter as growth slows. Croton balks at both extremes and will throw off leaves if the soil sits soggy or dries out hard for long, so keep the rhythm even.
Soil
Pot it in a well-drained, humus-rich mix packed with organic matter. Drainage carries the most weight here, since water pooling at the roots is what kicks off rot in a plant that otherwise loves to stay evenly moist.
Temperature
Hold it between 50°F and 85°F (10°C to 29°C), and never let it drop below 50°F. Cold drafts, chilly windows, and sudden swings all jolt it into dropping leaves, so a warm, steady spot keeps it growing strong.
Humidity
Croton craves high humidity to echo its tropical home, and dry indoor air crisps the tips brown fast. Cluster it with other plants, set the pot on a pebble tray, or run a humidifier through the heating season to keep it thriving.
Feeding
Feed a general-purpose fertilizer right through the growing season, spring into autumn, while the plant is pumping out fresh leaves. Then back off to a light hand in winter, when growth all but stalls.
Pruning
Croton bounces back from a hard cut in early spring, before new growth fires up, and that is your moment to rescue a leggy plant. Cutting it back this way drives fresh branching from lower down. Wear gloves, since pruning opens the irritant sap.
Repotting
Repot every 1 to 2 years, or sooner once it turns rootbound, bumping it up to a slightly larger pot in spring. Roots circling out the drainage holes, water rushing straight through, and stalled growth all shout that it is time.
Size & spacing
Indoors a croton commonly shoots up to 2 to 8 feet (61 to 244 cm) tall and spreads 2 to 6 feet (61 to 183 cm) wide, and in the tropics it climbs higher still. Give it elbow room so air moves around the foliage and the leaves do not crowd.
Troubleshooting
Croton wears its trouble on its leaves, and the cause almost always tracks back to light, water, humidity, or a change it did not like. Match what you spot below and jump on it early, before a small slip strips the stems bare.
Collapsing stems and a foul, waterlogged pot
A plant that wilts while the soil stays wet has caught root rot from too much water or a pot that will not drain, and the roots turn brown and mushy instead of firm and pale. Stop watering, repot into fresh, well-drained mix in a pot with drainage holes, trim away the rotted roots, and water again only once the top of the soil dries.
Fix:
- Stop watering and allow the soil to dry to the appropriate level
- Repot into fresh, well-drained, humus-rich mix in a pot with drainage, trimming rotted roots
- Resume watering only when the top half-inch to inch of soil dries
A rush of leaves dropping after a shift in spot
A croton that suddenly drops its leaves is reacting to a new spot, a cold draft, or a temperature swing, the changes it hates most. Cold below 50°F (10°C) and soil that lurches between soggy and bone dry pull the same trigger. Lock it into one warm, stable place, keep the watering even, and it springs the leaves right back.
Fix:
- Settle the plant in one stable, warm, draft-free spot and avoid further moves
- Keep temperatures above 50°F / 10°C and away from cold windows, doors, and vents
- Maintain consistent moisture, watering only when the top half-inch to inch of soil dries
Fine threads and a stippled, dusty sheen on leaves
Hot, dry air rolls out the welcome mat for spider mites, which leave fine webbing and a speckled, dusty cast on the undersides of the leaves. Rinse the foliage and crank up the humidity to set them back, then treat with insecticidal soap or horticultural oil and repeat as directed. Pull the plant away from the others until it is clean.
Fix:
- Rinse foliage and increase humidity
- Treat with insecticidal soap or horticultural oil, repeating as directed
- Isolate the plant to limit spread
Cottony wisps, brown scale bumps, and stickiness
White cottony clumps in the leaf joints point to mealybugs, while immobile brown bumps along the stems are scale, and both leave a sticky honeydew behind. Dab the visible pests off with an alcohol-soaked swab, then treat with insecticidal soap or horticultural oil and stay on it. Set the plant apart from the rest until the bugs are gone.
Fix:
- Wipe off or dab visible pests with an alcohol-moistened swab
- Treat with insecticidal soap or horticultural oil, repeating as directed
- Isolate the plant until the infestation is cleared
Bright leaf color draining away to green
Sit a croton in too little light and the new leaves come in greener and duller as the wild color drains away. Shift it somewhere bright, ideally with a little direct sun, and the variegation roars back on fresh growth. Short on a sunny window? A cultivar like 'Petra' holds its color better in interior light.
Fix:
- Move to a brighter spot with bright indirect light, ideally with some direct sun
- For best color give the brightest light the plant can tolerate without scorching
Bleached-gray leaves on the sun-struck side
Throw a croton straight into harsh, all-day sun and the most exposed leaves bleach to gray, dull, or scorched. Swap in bright but filtered light, or sun that travels across the day rather than beating down for hours. Ramp the light up slowly so the plant adjusts instead of burning.
Fix:
- Provide bright but filtered/indirect light or shifting sun rather than intense all-day direct sun
- Acclimate gradually when increasing light
Lower leaves yellowing and dropping off
Leaf loss low on the plant, in the shaded part, usually means the spot is just too dim. Brighten the location and spin the plant so light reaches it more evenly. Pull off any fully spent leaves once they let go.
Fix:
- Increase light levels
- Remove fully spent leaves and reposition for more even light exposure
Brown, crispy tips and leaf edges
Dry indoor air drives those crisp brown tips, since croton craves high humidity, and soil that dries out too far between drinks piles on. Cluster your plants, set the pot on a pebble tray, or run a humidifier, and keep the soil evenly moist by watering once the top half-inch to inch dries.
Fix:
- Raise humidity with a pebble tray, grouping plants, or a humidifier
- Keep soil evenly moist (not wet), watering when the top half-inch to inch dries
Toxicity
Respect this one and growing it stays trouble-free. The milky sap packs irritant diterpene esters that can inflame the mouth and gut of pets and bring on contact dermatitis in people, and no part of the plant is safe to eat. Pull on gloves before you cut it, and keep the leaves and trimmings well away from animals and children.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Mild
Let a cat gnaw a leaf and drooling follows, sometimes with vomiting or loose stools, while contact with the milky sap can irritate its lips and skin.
Dogs Mild
Expect drooling, an upset stomach, and sometimes diarrhea after a dog gnaws the plant, and sap on the muzzle or paws can redden the skin too.
Horses Caution
The same irritant sap can sting the mouth and gut, so keep a horse from grazing or mouthing the foliage and any cut stems.
Rabbits Caution
A small grazer has no business nibbling this one, since the diterpene esters in the sap can inflame the mouth and digestive tract, so keep it well out of reach.
Livestock Caution
Grazing animals like sheep, cattle, and goats need to stay clear of both the plant and its trimmings, since that caustic sap will irritate the mouth and digestive tract once eaten.
Birds Caution
That irritant sap can genuinely harm a bird, so station the plant far from where one might land and away from any nibbled or fallen leaves.
People Caution
Nothing on the croton belongs on a plate. Its milky sap burns the skin and eyes on contact and can set off contact dermatitis, so keep gloves on whenever cutting it and store the leaves out of children's reach.
Wear gloves when cutting or propagating; the milky sap can irritate skin and mucous membranes and may stain. Keep cut surfaces and fallen leaves away from pets and children
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Crotons come in a long, tempting list of named cultivars, sorted mostly by leaf shape and the mix of colors. Here are the ones you are most likely to track down.
'Petra'
The most common cultivar going, with dark green leaves veined in yellow, pink, and orange-red, and the one UF/IFAS singles out for holding its color well in indoor light.
'Gold Dust'
It carries rounded, oval bright green leaves flecked all over with golden yellow.
'Mammy'
It stands out for its narrow, twisting leaves in a bright jumble of colors.
'Eleanor Roosevelt'
It shows medium green leaves dotted with golden yellow that deepens to dark red.
'Andreanum'
It has broad oval yellow leaves edged and veined in gold.
'Spirale'
It twists its red and green leaves into a loose spiral.
'Majesticum'
It grows long leaves, around nine inches, banded in yellow and red.
How to propagate
Half the joy of croton is turning one plant into several, and it propagates from cuttings or by air-layering, both of which keep a named cultivar true to its parent. Either route, snap on gloves first so the sap stays off your skin.
Stem cuttingsModerate
Summer · Several weeks to root
Take softwood or tip cuttings in summer and root them in a moist medium, where they take several weeks to settle in. Wear gloves, because the milky sap is an irritant. Cuttings keep a cultivar true to type, while seedlings come out looking nothing like the parent.
Air layeringModerate
Spring · Several weeks
Croton air-layers easily in spring, rooting on the stem over several weeks before you sever it and pot it up. Wear gloves here too, since the sap irritates skin.
Myths
The croton grown as a houseplant is a bona fide Croton genus species.
Despite the name, the plant you grab off the shelf is Codiaeum variegatum, not a species of the genus Croton. The two share the Euphorbiaceae family, but Kew's Plants of the World Online lists Codiaeum variegatum as the accepted name in its own genus. The common name is just a carryover that stuck.
A croton that sheds a flush of leaves is done for.
Heavy leaf drop is the plant reacting to change, not throwing in the towel. A move, a draft, cold below 50°F, or uneven watering can all set it off. Once you steady its conditions it usually bounces back and grows the foliage in again.
A croton flaunts full color in whatever light it gets.
Color rides entirely on light. In a dim spot the leaves slide back toward plain green and lose their markings, while bright light, often with some direct sun, is what fires the color out. Pile on too much harsh sun and it swings the other way, washing the leaves to gray.