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The Walking Crow's Guide to Plants and Gardening
Coleus, also known as Painted Nettle or Flame Nettle, is a vibrant and versatile annual plant celebrated for its kaleidoscopic foliage. Its leaves come in a dazzling array of colors and patterns, ranging from fiery reds and oranges to deep purples, chartreuse greens, and even near-black shades. This striking foliage adds instant visual impact to gardens, containers, and indoor spaces.
- Genus: Plectranthus (previously classified as Coleus)
- Species: Plectranthus scutellarioides (formerly Coleus blumei)
- Cultivars: Countless cultivars exist, each offering unique leaf shapes, colors, and patterns.
- Growing Zone: Thrives in warm climates and is typically grown as an annual in most regions. It can be grown year-round outdoors in USDA Hardiness Zones 10-11.
- Origin: Native to tropical regions of Southeast Asia and Malaysia.
- Toxicity: Generally considered non-toxic to humans and pets. However, large ingestions may cause mild gastrointestinal upset.
- Health Benefits: No significant health benefits are directly associated with Coleus. However, like many plants, it contributes to improved air quality by absorbing carbon dioxide during photosynthesis.
- Soil: Prefers well-draining, fertile soil rich in organic matter.
- Sunlight: Varies depending on the cultivar. Most coleus varieties prefer partial shade to full shade, especially in hot climates. Some newer cultivars can tolerate more sun.
- Water: Requires regular watering, keeping the soil consistently moist but not soggy. Allow the top inch of soil to dry slightly between waterings.
- Temperature: Prefers warm temperatures between 65-85°F (18-30°C). Sensitive to frost.
- Humidity: Appreciates moderate to high humidity levels. Misting regularly or using a pebble tray can help increase humidity, especially in dry indoor environments.
- Fertilizer: Fertilize every 2-3 weeks during the growing season with a balanced liquid fertilizer diluted to half strength.
- Pruning: Pinch back young plants to encourage bushier growth. Deadhead flower spikes to promote continuous foliage production.
- Propagation: Easily propagated from stem cuttings.
- Coleus is known for its rapid growth and vibrant foliage, making it an excellent choice for adding quick color to gardens and containers.
- It can be grown as bedding plants, border plants, or in hanging baskets and containers.
- Coleus attracts pollinators like butterflies and hummingbirds with its small, tubular flowers, though many gardeners prefer to pinch off the flowers to focus on foliage growth.
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