Coco peat is a very popular substrate in which to grow plans. It's inert, making it the perfect growing medium for those wanting to manually add nutrients. Made from coconut fibre from the outer husk of a coconut.
The coco peat blocks are buffered, pre-soaked in a calmag making it suitable to be used as a growing medium.
Coco peat is great for adding aeration to your soil and can also be used alone in a hydroponic garden.
Each 650g block expands to roughly 9L of growing medium.