Well, I've made a couple, out of 55 gallon drums... they work OK.
The big advantages to my mind are that you get complete turn-over, it's relatively easy to achieve that turn-over, and everything's on a level that's easy to deal with.
However, they can't hold nearly as much as a normal bin, or pile, can. They tend to dry out if you don't watch it. And since you're constantly adding fresh material, it's hard to really get 'aged mulch' out of one.
My solution to the last problem is drilling pretty big holes, and capturing the fallout in a pan, or just letting it collect underneath, which is basically the last-stage.
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The big advantages to my mind are that you get complete turn-over, it's relatively easy to achieve that turn-over, and everything's on a level that's easy to deal with.
However, they can't hold nearly as much as a normal bin, or pile, can. They tend to dry out if you don't watch it. And since you're constantly adding fresh material, it's hard to really get 'aged mulch' out of one.
My solution to the last problem is drilling pretty big holes, and capturing the fallout in a pan, or just letting it collect underneath, which is basically the last-stage.