Foliage: Caladium

Light

Caladium plants prefer indirect light or moderate shade indoors. The narrower the leaves, the greater the amount of sun they can withstand. Growing them outdoors in containers gives you more control over light conditions. Some newer cultivars can be grown in full sun, but most caladiums need protection from too much intense light. When growing them in a garden, give them partial shade to full shade; full sun scorches their leaves.2

Soil

Plant caladium in a rich, well-drained soil in the garden or in potting mix for containers, such as a damp mix of soil and peat. Garden soil should be similarly rich and well-drained. The ideal soil pH is slightly acidic, at 5.5 to 6.2.

Water

When leaves appear on the plant, water as needed to keep the soil evenly moist. Never let the plant dry out, as leaves may yellow and drop. Stop watering the plant when the leaves start to die back. Resume watering in spring after winter dormancy. New leaves will reappear as temperatures warm.

Temperature and Humidity

The warmer the better for caladium houseplants. Aim for 70-75 degrees Fahrenheit during the day, 60-65 degrees at night, if possible, as that is the temperature at which tubers begin to grow. Keep the humidity as high as is practical. When planting outdoors, you can transplant potted tubers (or, better yet, simply transfer them in peat pots) after the last frost date for your area. Plants grown this way should be started indoors four to six weeks prior to transplanting.

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