Lower them into the bottle and use tools to press the soil firmly around the roots.
: About 8 cm of high-quality potting soil or peat-free coir compost. For tropical plants, a mix containing sphagnum peat moss or coco coir is ideal. Step-by-Step Construction Guide
To function as a closed system, your biosphere must include specific layers that handle drainage and filtration: bottle biosphere guide full
: A piece of mesh or weed suppressant fabric can be placed above the charcoal to keep the soil from sinking into the drainage layer.
: A thin coating of activated charcoal over the pebbles. This acts as a filter to keep the water "sweet" and prevent the growth of odors or harmful bacteria. Lower them into the bottle and use tools
: Add a small amount of water (roughly 1/2 cup or 100ml). It is critical to under-water initially, as you can always add more later but cannot easily remove it. Let the bottle sit open for about a week before sealing it permanently to allow the humidity to stabilize. Best Plants for a Closed Biosphere
Gently remove your plants from their original pots and shake off excess soil. Step-by-Step Construction Guide To function as a closed
For a sealed environment, select small, slow-growing plants that thrive in high humidity and indirect light. Making a Bottle Terrarium + Closed Terrarium Basics
: Pour in your pebbles, followed by a layer of activated charcoal.