For as long as I’ve gardened, I’ve always had a worm farm, something my parents also had for their gardens. They used an old wheelie bin converted into a multi-tier worm farm. They put a tap on the bottom tier, then placed two or three milk crates wrapped in mesh inside. The process starts with the bottom crate: you add your worm colony and organic scraps (food, lawn clippings, garden waste, etc.). The worms eat the scraps and convert them into castings, which you can use on your garden. A liquid byproduct also forms, which you can use as a liquid feed for your plants. When the first crate is…