Having now realised that an integral part of the Wicking Bed set up are the compost worms kept in them, I was very interested in a system I saw at Nirvana farm last weekend.
Deb has a tube-like structure which is buried under the soil into which you you place the worm's food. This is covered with a moistened jute or hessian type fabric (loosely woven natural fibre) and has a well fitting lid on top.
The sides of the top bucket are left intact but the bottom of the bucket (now at the top) is removed.
Deb's Garden was made using large plant pots with a lovely, bottomless, earthenware pot on top. This not only looks great but according to Deb helps to keep the worms cool.
This concept seems and ideal way of caring/feeding the worms in the wicking bed system. The size of the unit (the buckets or other containers) could be varied depending on the size of the bed you are using.
Since the wicking beds are self contained the worms won't escape although you would have to watch out that the pesky blackbirds didn't steal them and make sure the chooks don't escape and devour the lot!
Nirvana Organic Farm