What makes a good worm bin better? A series of multiple levels that
takes advantage of gravity, making it easy and fun to harvest the super
valuable worm juice.
You can spend about a hundred bucks on a fancy
commercial worm bin complete with drain spout, or you can build
your own home made
worm bin for well under half of that and use the left over cash to
build a 2nd unit. Why build another one? It might help to experiment
with some different kinds of worms to better match your climate, and 2
cups of worm juice is better than one.
The difficult part of outdoor worm bins is finding a warm place to move
them in the winter or rigging up some sort of passive solar or electric
blanket set up to keep the little rascals from freezing.