Quote Originally Posted by Mr. Clandestine
If I kept used soil inside a 55-gallon barrel, what needs to be done to make it suitable for outdoor gardening?
When you are ready to use it, lay down a tarp and dump the dirt on it.
Cover the pile of dirt with a black plastic sheeting. It should be warm, sunny weather when you do this.
Wait 1-2 weeks. The dirt should heat up big time, killing pests and weed seeds.
Then, you can mix in some regular compost, maybe some myco-stim, whatever amendments you like, and go to town!