Overview and Description:
Caladiums are tuberous tropical plants that are grown for their spectacularly colorful foliage. Although tropical, they grow fast enough to be enjoyed as annuals during the summer in cooler climates and all year long as houseplants. Caladiums thrive in warm, humid shade, and dazzle in shade gardens with their large, pointed arrow-shaped leaves splashed with shades of green, white, cream, pink and red. Although they don't usually flower when grown as annuals, the foliage puts on a dazzling show all season.
A Word of Caution: Caladiums can be a skin irritant and are poisonous if ingested.
Most Caladium varieties grow to about 18 -24 inches tall, however there are some dwarf varieties that peak at 8 -12 inches. The width of your plant will varies with cultivar and age.
Although they do flower, Caladiums are grown for their colorful leaves. The flowers are inconspicuous and when grown as annuals, they may not have time to flower at all.
Design Tips for Caladiums:
Caladiums are wonderful bright spots in a shade garden. Grouped together, they can look like they are in bloom.
Caladiums grow equally well in containers or in the ground. They pair nicely with ferns and other soft textured plants like astilbe, as well as with spiky leaved plants such as ornamental grasses and shade tolerant iris. Or plant them with coordinating colored blooms of fuchsia and Impatiens.
- Caladium bicolor ‘Freida Hemple’ - Bright Red Centers and wide green margins
- Caladium bicolor ‘'Little Miss Muffet’ - small, lime-green leaves with deep red speckles and often red veins
- Caladium bicolor ‘Pink Beauty’ - Pink centers surrounded by pink-speckled green margins, often with red veins
- Caladium bicolor ‘White Christmas’ - White leaves with green veins.
- Sun Tolerant Varieties Include: ‘Carolyn Whorton’, ‘Florida Fantasy’ & ‘Pink Cloud’
Caladium Growing Tips:
You can purchase Caladiums already in leaf or you can start with the less expensive tubers. Tubers purchased from a nursery will have a knobby appearance. Each knob is actually an eye that will produce a leaf. Sometimes the tubers are a bit desiccated and the knobs are hard to spot, but they should re-hydrate and sprout. Fresh tubers ordered from growers will sprout the fastest.
It can be confusing determining which end of the tuber is up, because the roots grow from the same side as the leaves. Trust the tuber to know what to do, and bury it about 2 inches deep with the knobs facing up.
When potting, start them in a damp peat/soil mix. Caladiums like a slightly acid soil pH (5.5 - 6.2). Once they sprout, move into indirect light.
To start caladiums indoors for outdoor planting, pot the tubers about 4 - 6 weeks before your last frost date. Wait until the soil warms to plant outdoors. Peat pots will make transplanting easier on the plants.
Winter Care in Cold Zones: If grown outdoors in a cold climate, they can be considered annuals or you will need to dig and store the tubers over winter. Do not wait for them to be hit by frost.
Division: You can divide your Caladium tubers in the spring, to create more plants. Cut the tuber into sections that each contain at least one eye or knob and pot or plant as normal.
Pests and Problems:
Although Caladiums are carefree growers, they can be subject to the following problems if growing conditions are not ideal: tuber rot (especially if planted outdoors in cold, wet soil), Southern blight, leaf spot and root-knot nematodes. Indoor Plants: aphids and spider mites.