Bulb · Araceae
Caladium
Caladium bicolor
Tropical leaf drama for the shaded, lived-in corners of a home.
Partial shade
Every 2–4 days
61–86°F · 16–30°C
60–90 days
Overview
Few foliage plants set a mood as quickly as the Caladium. Its paddle-shaped leaves read almost like artwork on a stem, and a single pot drops a note of the tropics into a quiet corner, a console table, or a shaded patio without asking for the spotlight. As a foliage bulb grown for its leaves rather than its flowers, it earns its place by look alone, settling comfortably into both indoor and outdoor settings.
This is a plant that rewards a thoughtful position more than a green thumb. Rated moderate to grow, it thrives in the soft, indirect light of a north-facing room or a dappled garden bed, the kind of gentle exposure that suits a relaxed daily routine. Reaching 12 to 30 inches (30 to 76 cm) in both height and spread, it holds its scale for a side table, a grouped display, or a border edge through a single warm season.
Living with Caladium means leaning into its rhythm. The leaves arrive, fill out fast, and carry the warmer months, then fade as the plant slips into winter dormancy, ready to return the following year. Worth a styling note up front: every part is mildly toxic if chewed, so a high shelf or a pet-free room keeps the look effortless and the household at ease.
Care
The short version: give Caladium a warm, lightly shaded spot, keep the soil evenly moist without letting it sit wet, and feed lightly through the growing season. Match it to a humid, draught-free room or a sheltered shaded bed, and the foliage will hold its mood all season before easing into winter rest.
Light
Light is the single biggest styling lever with this plant. It looks and grows best in partial shade, the soft glow of a north-facing room or a spot screened by sheers, and it will also take bright indirect light, partial sun, or full shade. UF/IFAS suggests around 2 to 4 hours of sun as a workable ceiling. Push it into hot direct light and the colour washes out, so reserve those bright, sun-soaked windows for other plants and let Caladium hold the gentler corners.
Water
Through active growth this is a thirsty plant that likes its soil kept evenly moist to the touch, roughly every 2 to 4 days depending on the room. Aim for steady moisture, never a saturated pot, since the tubers rot in soggy soil and a wet saucer undoes the whole look. As the leaves begin to yellow toward dormancy, ease right back on watering and let the plant wind down.
Soil
A fertile, free-draining mix high in organic matter suits Caladium best, the sort of loose, generous medium that holds moisture without staying wet. Keep it on the acidic side, a pH of 5.5 to 6.0, whether the plant is destined for a decorative pot indoors or a sheltered bed outside.
Temperature
This is a warmth-loving plant that settles happily into ordinary living spaces, comfortable between 61°F and 86°F (16°C to 30°C). Keep it clear of cold draughts, chilly entryways, and the cold downdraught of an air-conditioning vent, and the foliage stays calm and full through the season.
Humidity
Caladium reads as a humidity lover and prefers the air on the moist side, ideally 60% and above. A naturally damp room such as a bright bathroom or a kitchen suits it, and grouping it with other plants or setting it near a humidifier lifts the surrounding air to keep the leaves looking their best.
Feeding
Feed with a light hand through the growing season, on a roughly biweekly schedule. A balanced liquid fertilizer for containers works well, as does a slow-release low-phosphorus formula. Resist the urge to overfeed, since too much fertilizer fades the reds and whites toward plain green and flattens the very look the plant is grown for.
Pruning
Upkeep is minimal and mostly cosmetic. Snip away yellowing or damaged leaves right at the base to keep the display crisp and tidy. For a fuller, more generous flush, remove the prominent central bud on a tuber before planting, which nudges it toward more shoots and leaves.
Repotting
Plan to plant fresh each year from stored tubers, while leaving established clumps undisturbed where they have settled in. Signs it is time to give them more room include crowded or stunted leaf emergence, tubers visibly filling and lifting at the soil surface, and a season-long drop in leaf size and vigour.
Size & spacing
Expect a tidy, table-friendly plant that reaches 12 to 30 inches (30 to 76 cm) in both height and spread. When planting out a group or a border run, set the tubers eye-side up about 2 inches deep and space them 8 to 12 inches apart, which gives each one room to fill out into a relaxed, full-looking display.
When to plant
Caladium runs on the calendar of a warm-season houseguest: it arrives when the weather softens and bows out as the cool returns. Planning around that rhythm keeps the display reliable and the corner it dresses looking intentional rather than improvised.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Start tubers indoors 4-6 weeks before the last frost in a warm spot, keeping the medium about 70 degrees F, to get a head start in cold-winter regions
- Plant: After all danger of frost has passed and soil reaches at least 60-70 degrees F (late spring to early summer)
- Harvest: Grown for foliage, which reaches full size in one season; insignificant arum-type spathe flowers may appear in summer
Hardiness
USDA hardiness zones: 9–10
Temperature: down to -7°C
Troubleshooting
Most setbacks here trace back to where the plant sits and how it is watered rather than anything dramatic. Read the leaves and the tubers as cues, adjust the spot or the routine, and the look usually rights itself.
When tubers stall underground and turn to mush instead of growing
If the season starts and nothing breaks the surface, cold, wet soil is nearly always the culprit behind caladium tubers that stall or rot below ground. Hold off planting until the bed sits reliably at 60°F to 70°F (16°C to 21°C), open up the drainage so the soil stays moist but never soggy, and discard any tuber that has already gone soft. Beginning the season with clean, disease-free stock keeps fungal tuber rot from settling into the planting in the first place.
Fix:
- Wait to plant until soil is consistently 60-70 degrees F
- Improve drainage and reduce watering so soil is moist but not saturated
- Discard soft or rotted tubers and start with disease-free stock
When the colour drains out and the leaves read as plain green
A display that softens toward green and loses its red, pink, or white is usually a sign of too much direct sun or a heavy hand with feeding. Shift the plant into partial or dappled shade, well clear of harsh afternoon light, and ease the feeding to a light touch once or twice a season. Shade is what holds the colour, so the deeper the dapple, the richer the look the leaves bring to a room.
Fix:
- Move to partial or dappled shade with protection from hot afternoon sun
- Reduce fertilizer to a light application once or twice in the season
When the foliage looks ragged, holed, and chewed along the edges
Tattered caladium leaves are almost always down to slugs and snails, which work after dark and leave glistening slime trails as their calling card. Pick them off by hand at night or set bait, then tidy away the damp corners where they shelter. Foliage that looks torn rather than nibbled usually points to wind or hail knocking about the brittle leaves, so a sheltered, tucked-away position helps the display hold.
Fix:
- Hand-pick slugs and snails or use baits per label
- Site out of strong wind to protect brittle leaves
Toxicity
Caladium is a plant to admire, not to nibble, and that shapes where it belongs in a home. The notes below cover how it affects pets, livestock, and people so the display can sit somewhere safe and still look its best.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Toxic
A cat that takes a bite feels the sting immediately, pawing at its mouth and drooling heavily. Swelling spreads across the lips, tongue, and throat, and vomiting and trouble swallowing tend to follow.
Dogs Toxic
A dog that chews any part gets a sharp burn in the mouth, with heavy drooling and a swollen tongue. Most retreat quickly, though vomiting and a lost appetite can hang on for a day.
Horses Toxic
On contact the crystals inflame a horse's lips and mouth, bringing pain, drooling, and difficulty swallowing. Because horses cannot vomit, the irritation lingers right where the plant was bitten.
Rabbits Toxic
Rabbits meet the same needle-like crystals, which scald the mouth and gut and put them off their food. Keep the plant and any stored tubers well beyond their reach.
Livestock Toxic
Grazers such as goats, sheep, and cattle get mouth and gut irritation if they sample the leaves. The burn is immediate, so most spit it out fast, but keep the plants clear of pasture.
Birds Toxic
The oxalate raphides irritate a bird's mouth and crop exactly as they do in mammals, so pet birds should never reach the leaves or sap.
People Caution
No part of this plant is edible. A bite sets off instant burning of the lips and mouth, drooling, and swelling, and the sap can leave skin itchy, so wash your hands after handling and keep it away from children.
Keep plants and stored tubers out of reach of pets and children; wash hands after handling sap.
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
The Caladium line offers a few distinct looks, from near-white statement leaves to softer pink-flushed foliage and tidier strap-leaved forms. Choosing among them is really a styling decision about the mood you want a room or border to carry.
Candidum
A timeless fancy-leaved choice, valued for nearly white leaves traced through with bold green veining.
Pink Cloud
A named fancy-leaved cultivar on the NC State list, carrying a soft pink flush across its foliage.
Lance-leaved (strap-leaved) types
Narrower and usually under 12 inches tall, these handle more sun than the fancy-leaved kinds.
How to propagate
More Caladium is a matter of working with the tubers while they rest, then letting them do the rest in warm soil. Both routes below are easy and fit neatly into the dormant-season lull.
DivisionEasy
Late winter to early spring before planting, while tubers are dormant · 4-6 weeks to sprout in warm soil; full size in one season
Take on division in late winter to early spring, while the tubers rest dormant. Slice a large tuber into sections, leaving at least one eye on each, allow the cut surfaces to dry and callus, then set them eye-side up about 2 inches deep. Given warm soil, the pieces break the surface in 4 to 6 weeks and reach full size across the one season.
Offsets & pupsEasy
At lifting in autumn or replanting in spring · One growing season to reach mature size
Caladiums quietly produce their own daughter tubers around the parent. Lift the clump in autumn or as you replant in spring, ease the offsets away, and plant them out on their own, where they need a single growing season to reach mature size.
Myths
Bright leaf colour means a caladium wants full sun.
The truth runs the opposite way. Colour deepens most under partial or dappled shade, while too much direct sun fades the reds, pinks, and whites toward green and scorches the fragile leaves.
Caladium tubers can go in early in spring, just like hardy bulbs.
These are tropical plants, and cool ground leaves them to rot or stall. Wait until the soil reaches at least 60°F to 70°F (16°C to 21°C) before the tubers go down, which usually lands in late spring rather than the first mild day.