Complete Guide to Caladium Care and Growth

The Sweet Spot

Caladium wants bright light that is mostly filtered. An east window is ideal: a little soft morning sun, then bright light for the rest of the day. A south or west window works if the plant sits three to five feet back or behind a sheer curtain, so the strong afternoon sun never lands directly on the leaves.

Colour depends on light. A caladium in a bright spot holds its pinks and reds well, while one in a gloomy room tends to look washed out and greener.

Too Little Light

In a dim corner the leaf stalks stretch long and thin toward the window, the leaves flop over, and each new leaf comes up smaller. It is the indoor version of leggy growth. Move it closer to the window, or add a grow light for 10 to 12 hours a day if no window in the house is bright enough. Our light guide helps you judge your windows.

Too Much Light

These leaves are paper thin, so hot direct sun scorches them fast. You will see bleached, almost translucent patches that dry to brown, which is sunburn. Some newer cultivars handle a couple of hours of direct sun a day (more on those under Types), but even those prefer dappled light, and none of them want a hot south windowsill in July.

Watering in the Growing Season

From the first leaf in spring until the leaves start fading in autumn, keep the mix evenly moist, like a wrung-out sponge. In practice that usually means watering when the top half inch to an inch feels dry. A caladium with a full head of leaves in a warm room can need water twice a week in summer, so check rather than following a calendar. A moisture meter takes the guessing out of it.

Water thoroughly until it runs out of the drainage holes, then empty the saucer after ten minutes. Our watering guide covers the basics.

Watering a Newly Planted Tuber

This is where most rot happens. A freshly potted tuber has no leaves to use water, so keep the mix only barely damp until shoots appear. Soaking a cold, leafless tuber is the fastest way to turn it to mush.

Signs of Trouble

Thin leaves wilt the moment the soil dries out, so a droopy caladium in dry mix usually perks up within a few hours of a drink. Repeated wilting, though, leaves brown crispy edges behind. Drooping in wet soil is the opposite problem: the roots or tuber are rotting, and more water makes it worse. As autumn arrives and leaves begin to yellow, start cutting water back, which the Dormancy section explains step by step.

What the Soil Needs

Caladium roots like steady moisture, but the tuber rots in mix that stays wet and airless. The goal is a soil that holds water like a sponge yet drains freely. Extension guides for container caladiums recommend mixes based on peat moss or coir with fine pine bark, which is a good description of what works indoors too.

DIY Soil Mix

My mix, by volume:

• 3 parts peat-based or coir-based potting mix
• 1 part fine orchid bark
• 1 part perlite

Mix it dry, dampen it lightly, then plant. It should feel springy, not heavy, in your hand.

Pre-Made Options

A good bagged indoor potting soil with a couple of handfuls of perlite stirred in does the job. A chunky aroid mix also works, though you will need to water a bit more often. Avoid garden soil and heavy compost on its own, which pack down around the tuber.

When and How Often

Start feeding once the first leaves have fully opened in spring, then every 3 to 4 weeks through summer. Stop as soon as the leaves begin to fade in autumn. A tuber heading into dormancy cannot use the nutrients, and they just build up as salts in the pot.

What to Use

A balanced liquid houseplant fertilizer at half the label strength is plenty, always poured onto damp soil. Thin leaves burn easily, and an overfed caladium shows it at the edges first. Our fertilizing guide and fertilizer roundup cover the options.

Over-Fertilizing Signs

Brown, burnt-looking leaf margins on a plant that is watered properly, or a white crust on the soil surface, both point to salt buildup. Flush the pot with plain water for a minute and skip the next two feeds.

Ideal Growing Temperature

Caladium is a heat lover. It grows best in a warm room, roughly 70 to 85°F (21 to 29°C), which is why it thrives through summer and sulks in cooler months. Extension guides advise waiting for soil of about 70°F (21°C) before planting tubers outdoors, and the same warmth gets indoor tubers sprouting fastest.

Cool rooms below about 60°F (16°C) slow it right down and can push it into early dormancy. Frost kills the leaves outright and damages the tuber.

Drafts and Heat Sources

Keep it away from cold draughts, open doors in spring, and air conditioning vents blowing straight onto the leaves, all of which make the thin foliage wilt and brown. Radiators are less of an issue only because the plant is usually dormant by heating season, but a tuber stored right next to one can dry out and shrivel.

Ideal Humidity

Aim for 50 percent or higher. Caladium leaves have very little substance to them, and in dry air the edges go brown and papery within days. Summer humidity in most homes is fine, which suits a plant that is only in leaf in the warm months anyway.

Signs the Air Is Too Dry

The first sign is a thin brown rim along the leaf edge, often on the newest leaves first. Leaves that curl slightly inward or feel crisp rather than soft point the same way. Damage does not reverse, so judge any fix by the next leaf.

Easy Humidity Boosters

Group it with other plants, stand the pot on a pebble tray with the base above the waterline, or run a small humidifier nearby during dry spells. A bright bathroom works well too. Our humidity guide has more options. Skip heavy misting, since water sitting on the leaves in a cool room invites spotting.

Why Your Caladium "Dies" in Autumn

This is the big one. Caladiums grow from a tuber, and in the wild they rest underground through the dry season. Indoors, as the days shorten and rooms cool in autumn, the leaves turn yellow one after another and collapse until nothing is left. Your plant is not dead. It is pulling its energy back into the tuber for a rest that can last a few months or longer.

When the first leaves start to fade, stop fertilizing and water less. Once most of the leaves have yellowed, stop watering altogether and let the pot dry out. Cut the dead foliage off at soil level.

Storing Tubers in the Pot or Lifted

The easy route is to leave the tuber in its dry pot and put the whole thing somewhere warm, like a closet in a heated room. Do not water it at all until spring.

Alternatively, lift it. Ease the tubers out, let them dry in a warm, airy spot for one to two weeks, brush off the soil, and pack them in dry peat moss, perlite or vermiculite in a box or paper bag, not touching each other. Check them once a month and throw out any that turn soft.

Storage Temperature

This is where caladiums differ from most bulbs: they need warm storage, not cold. Keep tubers above 60°F (16°C), and somewhere around normal room temperature is safest. Never put them in a fridge, garage or unheated shed. Chilled tubers can look fine and still come up slow, patchy and weak the following year.

Waking It Up in Spring

In early to mid spring, repot the tuber into fresh mix, knobby side up, and keep it warm and barely damp in bright light. Sprouting can take several weeks, and longer in a cool room. Warmth is what wakes it, so a spot near (not on) a warm appliance or a seedling heat mat speeds things up.

What the Flowers Look Like

A caladium sometimes throws a flower in summer: a greenish-white hood (the spathe) wrapped around a short spike, similar to a small calla lily or jack-in-the-pulpit. It usually sits low among the leaf stalks and is easy to miss.

Why to Cut It Off

Most growers pinch or snip the flower stalk off at the base as soon as they see it. Making a flower diverts energy from the leaves and can leave you with a smaller tuber at the end of the season, and a strong tuber is what gives you next year's display. If you want an aroid that flowers properly indoors, a Peace Lily does that job far better.

Fancy-Leaf vs Lance-Leaf Caladiums

Shops sort caladiums into two groups. Fancy-leaf types are the classic look: big heart-shaped leaves on long stalks, reaching roughly 12 to 30 inches tall. Lance-leaf types, also sold as strap-leaf, have narrower, elongated leaves, often with ruffled edges. They usually stay under 12 inches and produce more leaves per plant, which makes them a good fit for shelves and windowsills.

Care is the same for both. Pick by size and look.

Sun-Tolerant vs Shade Caladiums

Older cultivars burn quickly in any direct sun. Newer releases, many from the University of Florida breeding program, tolerate a couple of hours of direct sun a day, which indoors means they forgive a brighter window. Clemson Extension lists 'Aaron', 'Florida Elise' and 'Red Flash' among the more sun-tolerant fancy-leaf types. Lance-leaf types are often more sun-tolerant as a group.

Popular Caladium Cultivars

Fancy-leaf:

• 'Candidum': an old favourite, white leaves with green veins. A shade type.
• 'Aaron': white leaves with broad green margins, and more sun-tolerant than most whites.
• 'Red Flash': dark red leaves with fuchsia spots and green edges. Vigorous, with large leaves.
• 'Florida Elise': green leaves with rose-pink blotches and speckles, released by the University of Florida in 1991.

Lance-leaf:

• 'Florida Sweetheart': wide lance leaves with rose centres and green margins. The University of Florida describes it as the most popular lance-leaf cultivar sold.
• 'Florida Red Ruffles': a red lance-leaf type that UF reports handles cold better than the older red lance cultivars.

Which Caladiums Store Best

If you plan to keep your tubers for several years, white-leaved cultivars are a sensible pick. Clemson Extension notes that white-foliaged tubers tend to store better than other colours. Whatever you grow, the second year's leaves are often a little less impressive than the first, so judge a cultivar on its first summer.

If you love caladium colour but not the yearly dormancy, a Rex Begonia gives you metallic pinks and silvers all year round.

When to Repot

Every spring, as the dormant tuber wakes up. Start it in fresh mix rather than last year's tired soil, which is the right moment to check the tuber for soft spots too. Do not repot a plant that is in full leaf unless it is rotting.

Choosing a Pot and Tuber

Larger tubers carry more buds and give fuller pots, so buy the biggest tubers you can, or plant two or three smaller ones together in a wider pot. Choose a pot with drainage holes. Plastic or glazed ceramic suits caladium better than terracotta, since this plant likes steady moisture. Our guide to plant pots compares the options.

Planting a Tuber Step by Step

1. Find the top of the tuber, the knobbly side with buds (eyes). The smoother side with old root scars goes down.
2. For a bushier plant, you can lift out the large central bud with the tip of a sharp knife, which pushes the smaller buds around it to sprout instead.
3. Plant it 1.5 to 2 inches deep in damp, not wet, mix.
4. Keep it warm and bright and water sparingly until shoots appear. Our repotting guide covers general technique.

What to Remove

There is no shaping to do. Cut yellowing or damaged leaves off at the base with clean scissors, and remove any flower spathes as they appear. A leaf with a small brown edge can be trimmed along its natural outline, though it will not regrow.

Cutting Back for Dormancy

In autumn, leave fading leaves on until they are fully yellow or collapsed. While they are yellowing, the plant is still pulling nutrients back into the tuber for next year. Once they are limp and brown, cut them off at soil level and let the pot dry.

Safety First

Wear gloves or wash your hands after handling. The sap contains calcium oxalate crystals and stings on broken skin or in your eyes. Keep trimmings well away from pets.

Best Method: Tuber Division

You cannot root a caladium leaf. The plant grows from its tuber, so propagation means dividing the tuber, best done in spring just before you replant. Large tubers can be cut into several pieces, and each piece grows into its own plant.

Step-by-Step Division

1. Take a firm, healthy tuber out of storage in spring.
2. Look for the buds on top. Cut the tuber into pieces with a clean knife so that each piece has at least one bud, ideally two.
3. Leave the pieces somewhere warm and dry for 24 to 48 hours until the cut surfaces form a dry skin. Planting a freshly cut tuber is an invitation to rot.
4. Plant each piece bud side up, 1.5 to 2 inches deep, in damp mix.
5. Keep warm and only barely moist until shoots appear.

Tips for Success

Small tubers are best left whole, since tiny pieces make weak plants. Expect divided pieces to sprout a little later than whole tubers. Our plant division guide covers the general idea.

Spider Mites and Aphids

Spider mites love warm, dry rooms and thin leaves. Look for fine pale stippling and faint webbing under the leaves. Rinse the plant gently in the shower, then treat with insecticidal soap weekly for three weeks. Aphids cluster on new, unfurling leaves and rinse off easily with lukewarm water.

Mealybugs and Thrips

Mealybugs show up as white cottony blobs where leaf stalks meet the soil. Dab them with a cotton bud dipped in rubbing alcohol. Thrips leave silvery streaks and distorted new leaves and need repeated treatments with insecticidal soap or neem.

Fungus Gnats and Prevention

Fungus gnats mean the top of the mix is staying too wet, often around a newly planted tuber. Let the surface dry a little between waterings. For prevention, check leaf undersides each time you water, and inspect stored tubers for pests before replanting them.

Yellowing and Collapsing Leaves

In autumn this is dormancy, not a disease, and the Dormancy section tells you what to do. In spring or summer, yellowing leaves on a plant in wet soil usually mean overwatering. If the leaves drop in mid-summer after a cold draught, that is leaf drop from chill, and the plant usually pushes new leaves once it is warm again.

Tuber Rot

Caladium's main killer is a tuber sitting in cold, wet soil. The stems go soft at the base, the plant wilts in damp mix, and the tuber feels mushy. Unpot it, cut away soft parts back to firm tissue, let the cuts dry for a day, and replant in fresh, barely damp mix. Fully mushy tubers cannot be saved. This is the caladium version of root rot.

Brown Crispy Edges

Crispy margins come from dry air, a plant that has wilted from thirst a few times, or fertilizer salts. Raise humidity, water more consistently, and flush the pot.

Faded Colour and Floppy Leaves

If the pinks and reds look dull or greener than when you bought the plant, light is usually the cause. Caladium colour shifts with light, and shade tends to bring out more green. Long, weak leaf stalks that flop sideways point the same way. Move the plant somewhere brighter with filtered light. The current leaves will not change, but new ones come up sturdier and more colourful.

Solo Setups

A single full pot of a fancy-leaf caladium makes a great summer table centrepiece, especially in a plain pot that lets the leaf colour carry the look. Lance-leaf types fit a windowsill or a narrow shelf.

Grouped Arrangements

Caladium colour pops hardest against plain green. Group it with a Peace Lily or ferns, or go the other way and build a colour-foliage corner with a Polka Dot Plant, Coleus or a Nerve Plant. A dark Alocasia Polly next to a white caladium is a striking pair, and both take a similar winter rest, so they can slow down together.

Summer Outdoors and Where Not to Put It

Once nights stay warm, a caladium can spend summer on a shaded patio or balcony, then come back in before temperatures drop in autumn. Indoors, keep it off hot sunny windowsills, out of cold draughts, and well away from cats, dogs and small children, since every part of the plant is toxic.

Seasonal Tips

• Mark your calendar for spring. A dormant pot in a closet is easy to forget until it is too late in the season.
• Taper, do not stop suddenly. Cut water back as leaves fade, then go fully dry once most have yellowed.
• Store warm. Above 60°F (16°C), never in a fridge or garage.

Everyday Care Tips

• Rotate the pot weekly. Leaves lean hard toward the light.
• Water more in heatwaves. A full caladium in summer drinks much faster than you expect.
• Pinch off flowers early so the energy stays in the leaves and tuber.
• Buy big tubers. More buds means a fuller pot from day one.