Caladiums (Caladium hortulanum) are tropical perennial plants that grow from bulbs and are prized for their large, colorful foliage. Caladiums have bright, multicolored leaves and can grow up to 30 inches tall, depending on the cultivated variety. Although they grow to full size during a single season, caladiums are cold tender and cannot grow year-round in most climates. Two main types of caladiums exist: lance-leafed and fancy-leafed caladiums. Fancy-leafed types have large, heart-shaped leaves, while lance-leafed caladiums have elongated, narrow leaves.
Place your caladiums in bright, indirect light and away from full, direct sun. You can set your caladiums beside a window with dappled or filtered sunlight.
Water your caladiums two or three times per week to keep the soil evenly moistened but not soggy or waterlogged. Provide water until it begins to drain from the bottom of the pot. Discard any excess water from the drainage dish after watering.
Feed your indoor caladiums once every two weeks while they're actively growing with a water-soluble houseplant fertilizer. Follow the instructions on the label for the proper dosage.
Treat your indoor caladiums for leaf spot diseases by pruning away the diseased leaves. The leaf spots are often caused by a fungal disease and cause light tan or brown spots on the lower leaves.