Sun-Tolerant Caladium Sun Sun-tolerant caladiums perform best in full sun to part shade. They can handle 6 or more hours of direct sun, though morning sun with some afternoon relief will give you the most vibrant color. In full sun, expect more compact plants with bolder, brighter foliage. Too much shade and the colors can fade or become washed out. Water Caladiums need consistent moisture, especially when getting established and when growing in full sun. Keep the soil moist but never waterlogged — soggy soil leads to tuber rot. The more sun they're in, the more frequently you'll need to water. Mulching around the plants helps retain moisture between waterings. Soil Plant in moist, well-draining soil with a slightly acidic pH (around 5.5–6). Caladiums appreciate soil with some organic matter worked in. Good drainage is non-negotiable — tubers sitting in wet soil will rot. Fertilizer Go light. A slow-release, low-phosphorus fertilizer applied once or twice during the g...