Compost provides necessary nutrients and aeration to poor, compacted soil. Recharging your garden with compost after rotating planting sites ensures a healthy harvest. Tumbling helps your compost heap maintain an even temperature and break down organic matter faster. Tumbling bins are also neater than piles.
Dig two side-by-side holes 2 feet deep, about 4 feet apart.
Place a piece of 6-foot-long PVC pipe in each hole. Backfill the hole with small, sharp-sided gravel.
Hang a plumb bob from a spirit level to make sure the pole is level and plumb.
Mix the concrete mix with water according to the manufacturer's instructions in a 5-gallon plastic bucket. Fill the holes with concrete and allow the concrete to dry for 3 to 4 days.
Attach a reducing PVC slide connector to the top of each PVC pipe using PVC cement.
Drill a 1/2-inch-diameter hole in each end of your 30-gallon plastic barrel and insert the steel rod through the holes.
Place the rod ends through the slide connector rings.
Add compost materials and spin the barrel every other day.