Bark

The Soil Lab Bark comes in 9mm-12mm grade.

Bark is a common component of many plant soil mixes and is particularly popular for orchids, bromeliads, and other epiphytic plants.

Bark is a natural and renewable resource that provides excellent drainage, aeration, and stability for plants. It is typically made from the outer layer of trees, which is removed and cut into small pieces. Bark chips or chunks can be added to soil mixes to increase porosity and help prevent soil compaction. The larger the bark pieces, the more drainage and aeration they provide.

However, it's important to note that bark alone sometimes doesn't retain enough nutrients for plants to grow, and it's typically used in combination with other soil components like coconut coir or worm castings. If you're looking for a natural and effective way to improve drainage and aeration in your plant's soil, bark can be a great choice.