Coleus ‘Pineapple Splash’ Care Sheet for Terrariums
 
Introduction:
Coleus ‘Pineapple Splash’ (Plectranthus scutellarioides ‘Pineapple Splash’) is a bright, tropical-looking foliage plant known for its vibrant lime-green leaves splashed with creamy yellow and edged in deeper green tones. Its fresh, luminous colouring makes it an eye-catching addition to terrariums.
 
Follow these care guidelines to keep your Coleus ‘Pineapple Splash’ healthy and thriving:
1. Terrarium Setup:
Use a well-draining, nutrient-rich indoor potting mix. A light and airy substrate helps prevent root rot.
In closed terrariums, include a drainage layer (such as LECA or gravel) to prevent excess water from sitting at the roots.
 
2. Light:
Provide bright, indirect light to maintain the vibrant lime and yellow variegation.
Avoid prolonged direct sunlight, especially in glass enclosures, as this can scorch the leaves.
Insufficient light may cause fading and leggy growth.
 
3. Temperature and Humidity:
Maintain temperatures between 18–24°C (65–75°F). Coleus prefers warm, stable indoor conditions.
Humidity levels of 50–70% are ideal. While it tolerates moderate humidity well, ensure it is not kept in overly stagnant, wet conditions.
 
4. Watering:
Keep the soil consistently moist but not waterlogged.
Water when the top layer of soil begins to feel slightly dry.
Always water at the base of the plant to avoid excess moisture on the foliage, which can lead to fungal issues in terrariums.
 
5. Fertilization:
Feed with a balanced, water-soluble liquid fertilizer every 2–4 weeks during spring and summer.
Use a diluted solution to prevent salt build-up in enclosed terrarium environments.
 
6. Pruning and Maintenance:
Pinch back growing tips regularly to maintain a compact, bushy shape.
Remove any yellowing, wilted, or damaged leaves promptly to keep the terrarium clean and healthy.
 
7. Air Circulation:
Ensure adequate airflow, particularly in closed terrariums.
Open the lid periodically to allow fresh air exchange and reduce the risk of mold or mildew.
 
8. Monitoring for Pests:
Watch for common pests such as aphids, spider mites, or mealybugs.
Treat infestations early with insecticidal soap or neem oil, applying carefully in the enclosed environment.
 
9. Repotting:
Repot if the plant becomes root-bound or outgrows its container.
Use fresh, well-draining soil to support continued healthy growth.
 
10. Terrarium Companions:
Coleus ‘Pineapple Splash’ pairs well with other plants that prefer bright, indirect light and evenly moist soil.
 
Avoid combining with plants that require constantly saturated conditions.
By following these care guidelines, your Coleus ‘Pineapple Splash’ will maintain its vibrant colour and compact growth, bringing a fresh, tropical feel to your terrarium display.