Description
Coleus scutellarioides
Height – 1.0 to 3.0 feet (.30 to .91 m)
Spread – 1.0 to 3.0 feet (.30 to .91 m)
Sun exposure – Partial to full shade
Soil requirements – Fertile, well-drained
Hardiness zones – 10 to 11
Coleus is a tropical plant native to Asia. It belongs to the same family as mint. It is prized in North American gardens for its striking, multicolored foliage in combinations of green, yellow, pink, red, and maroon. Coleus also has a wide variety of leaf sizes and overall shapes.
Coleus plants require a very warm climate to grow outdoors as a perennials. Elsewhere they are often grown as outdoor annuals, container plants, and houseplants.
Light
Most varieties of coleus grow best in partial shade. Some tolerate even deep or full shade. A few newer varieties will grow in full sun. Check plant labels to provide the right amount of sun for the cultivar you buy.
Water
Coleus prefers moist soil that is never soaking wet. Soil and container drainage is essential. Water it whenever the top inch (2.5 cm) of soil is dry.
Temperature & Humidity
This is a tropical plant, so it requires warm temperatures and enjoys humidity. Coleus only grows well outdoors year-round in USDA zones 10 and higher and does not do well in low winter temperatures.
Soil
Fertile soil with organic material is ideal for coleus, but drainage is vital. For containers, use a standard but good-quality potting mix. For growing in beds, amend the soil as necessary to improve drainage or add nutrients.
Fertilizer
You can add some general, balanced fertilizer at the time of planting coleus. It will also benefit from an application every month during the growing season. Avoid fertilizers higher in phosphorus. These will promote flowers, but coleus is grown for its striking leaves, and its flowers are somewhat unremarkable.
Problems, Pests & Diseases
Coleus plants don’t succumb to many problems. Ensure good drainage and avoid overwatering them to prevent rot. Pests you might see include spider mites, whiteflies, and aphids.
