Coleus ‘Vegas Neon’ (Plectranthus scutellarioides ‘Vegas Neon’) is a vibrant and eye-catching foliage plant, celebrated for its neon-bright pink, red, and green leaves. Its bold, luminous colors make it a striking feature in terrariums, perfect for adding a pop of brightness to indoor plant displays. Follow these care guidelines to keep your Coleus ‘Vegas Neon’ healthy and thriving:
 
1. Terrarium Setup:
Use a well-draining, nutrient-rich indoor potting mix suitable for foliage plants.
In closed terrariums, include a drainage layer (gravel, LECA, or small stones) to prevent water accumulation and reduce the risk of root rot.
 
2. Light:
Provide bright, indirect light to maintain the neon-bright leaf coloration.
Avoid prolonged direct sunlight, especially in enclosed glass terrariums, as it can scorch the leaves.
Insufficient light may dull the colors and encourage leggy growth.
 
3. Temperature and Humidity:
Maintain temperatures between 18–24°C (65–75°F). Coleus prefers warm, stable indoor conditions.
Ideal humidity is 50–70%, with occasional ventilation in closed terrariums to prevent fungal problems.
 
4. Watering:
Keep the soil evenly moist but not waterlogged.
Water when the top 1 cm of soil feels slightly dry.
Water at the base to avoid wetting the leaves, which can lead to mildew or rot.
 
5. Fertilization:
Feed with a balanced, water-soluble liquid fertilizer every 2–4 weeks during spring and summer.
Use a diluted solution appropriate for terrarium use to prevent salt build-up.
 
6. Pruning and Maintenance:
Pinch back growing tips regularly to encourage compact, bushy growth and maintain vibrant leaf display.
Remove yellowing, wilted, or damaged leaves promptly to keep the terrarium clean.
 
7. Air Circulation:
Provide occasional ventilation in closed terrariums to maintain healthy humidity and prevent mold or mildew.
Good airflow promotes strong growth and vivid foliage.
 
8. Monitoring for Pests:
Check for pests such as aphids, spider mites, or mealybugs.
Treat infestations promptly with insecticidal soap or neem oil, carefully applied within the terrarium.
 
9. Repotting:
Repot if the plant becomes root-bound or outgrows its container.
Refresh with fresh, well-draining soil to sustain healthy growth.
 
10. Terrarium Companions:
Coleus ‘Vegas Neon’ pairs well with plants that enjoy bright, indirect light and evenly moist soil.
Avoid pairing with plants that require constantly saturated conditions, as Coleus prefers moist but well-drained soil.