🌿Coleus ‘Downtown Greenville’ Care Sheet for Terrariums:
 
Introduction:
Coleus ‘Downtown Greenville’ (Plectranthus scutellarioides ‘Downtown Greenville’) is a compact, vibrant foliage plant known for its rich burgundy to deep red leaves often edged with contrasting tones. Part of the Downtown series, it is well-suited to contained environments and adds bold colour contrast to terrariums.
 
Follow these care guidelines to keep your Coleus ‘Downtown Greenville’ healthy and vibrant:
1. Terrarium Setup:
Use a well-draining, nutrient-rich indoor potting mix. A light, airy substrate helps prevent root rot.
If using a closed terrarium, ensure a proper drainage layer (such as LECA or gravel) is in place to prevent water from pooling at the roots.
 
2. Light:
Provide bright, indirect light for best colour intensity.
Avoid harsh direct sunlight, particularly in closed terrariums, as this can scorch the leaves.
Lower light levels may cause the plant to become leggy and reduce the vibrancy of its foliage.
 
3. Temperature and Humidity:
Maintain temperatures between 18–24°C (65–75°F). Coleus thrives in warm, stable indoor conditions.
Humidity levels of 50–70% are ideal. While it appreciates moderate humidity, excessive moisture without airflow can encourage fungal problems.
 
4. Watering:
Keep the soil consistently moist but never waterlogged.
Water when the top layer of soil begins to feel slightly dry.
Water at the base of the plant to avoid wetting the foliage, which can lead to mildew in enclosed terrariums.
 
5. Fertilization:
Feed with a balanced, water-soluble liquid fertilizer every 2–4 weeks during the growing season (spring and summer).
Use a diluted solution to prevent fertilizer salt build-up, especially in closed systems.
 
6. Pruning and Maintenance:
Pinch back growing tips regularly to maintain a compact, bushy shape and prevent legginess.
Remove any yellowing 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 fungal growth.
 
8. Monitoring for Pests:
Watch for common pests such as aphids, spider mites, or mealybugs.
Treat infestations early using insecticidal soap or neem oil, applying carefully within the terrarium environment.
 
9. Repotting:
Repot if the plant becomes root-bound or outgrows its container.
Refresh with fresh, well-draining soil to support continued healthy growth.
 
10. Terrarium Companions:
Coleus ‘Downtown Greenville’ pairs well with other plants that enjoy similar light and moderate moisture conditions.
Avoid pairing with plants that require constantly saturated soil, as Coleus prefers evenly moist but well-drained conditions.
 
By following these care guidelines, you can maintain a thriving Coleus ‘Downtown Greenville’ in your terrarium. Its deep, dramatic foliage will create striking contrast and visual depth in your indoor plant display.