These natural trays also eventually biodegrade, but they can be re-used.
The fibre ‘cap’ on these plugs is simply there to stop the organic compost falling out, either pop on the compost heap when you put in the seed or cutting, or put it back. The seed should grow through, and you have a mini mulch mat.
These little plugs are really great for introducing wild flowers and stuff
into areas of your garden ( or meadow if you are really lucky) where you would like to create a natural space.
Jenny's books can suggest how to create these 'wildlife' sanctuaries, have a gander at www.thenaturalgardener.co.uk/jenny_steel.php