Coleus 'Black Lace' Care Sheet for Closed Terrariums
 
Overview: Coleus 'Black Lace' is a captivating ornamental plant with dark, intricate foliage, making it an excellent choice for closed terrariums. Here's a care guide tailored specifically for growing Coleus 'Black Lace' in a closed terrarium environment.
 
Terrarium Setup:
Choose a spacious, clear glass container with a tight-fitting lid to create a closed terrarium environment.
Layer the bottom with drainage materials like gravel or activated charcoal to prevent waterlogging.
Add a thin layer of sphagnum moss or a moisture-retaining substrate to promote humidity and moisture regulation.
 
Light:
Coleus 'Black Lace' thrives in bright, indirect light, making it suitable for placement near a window or under artificial grow lights.
Avoid placing the terrarium in direct sunlight, as it can cause excessive heat buildup and lead to overheating or leaf scorch.
 
Watering:
Closed terrariums create a self-sustaining ecosystem where water recycles within the container.
Water sparingly, only when condensation levels drop significantly or the soil feels dry to the touch.
Monitor moisture levels closely to prevent overwatering, which can lead to root rot and fungal issues in the enclosed environment.
 
Temperature:
Maintain a consistent temperature range between 65°F to 75°F (18°C to 24°C) within the terrarium.
Avoid exposing the terrarium to extreme temperature fluctuations, as it can stress the plant and disrupt the enclosed ecosystem.
 
Humidity:
Closed terrariums naturally create a humid environment ideal for Coleus 'Black Lace'.
Monitor humidity levels regularly and ensure they remain within the optimal range of 60% to 80%.
If humidity drops, mist the inside of the terrarium with water or place a small humidifier nearby to increase moisture levels.
 
Soil:
Use a well-draining, nutrient-rich potting mix suitable for tropical plants.
Ensure the soil is not overly compacted to allow for adequate root growth and oxygenation within the enclosed environment.
 
Fertilization:
Coleus 'Black Lace' in closed terrariums typically requires minimal fertilization due to the recycling of nutrients within the ecosystem.
If necessary, apply a diluted, balanced liquid fertilizer sparingly during the growing season to supplement nutrient levels.
 
Pruning:
Regularly trim back any overgrown or leggy stems to maintain the desired size and shape of the plant within the terrarium.
Remove any yellowing or dead leaves to promote overall plant health and prevent decay in the enclosed environment.
 
Pests and Diseases:
Closed terrariums provide a protective barrier against most pests and diseases.
However, monitor the plant closely for signs of pest infestations or fungal issues, especially in areas with poor air circulation.
Treat any problems promptly with appropriate organic or chemical remedies to prevent them from spreading to other plants in the terrarium.
 
Additional Tips:
Rotate the terrarium occasionally to ensure uniform light exposure and prevent uneven growth.
Keep the terrarium clean by wiping down the glass walls periodically to remove dust and debris.
Enjoy the unique beauty of Coleus 'Black Lace' as it thrives within the enclosed ecosystem of your closed terrarium, creating a mesmerizing miniature garden display.