I have just freed a large number of plants from their pots of long standing primarily because, after overwintering them bare root, I look forward to providing them fresh soil. Meanwhile I've now this very large container of 'used' potting soil and wonder how to revive and enhance it over the coming months such that it can be reused. On hand I've a large quantity of comfrey leaves I could cut and mix in, 6-month old comfrey tea I suspect at this point I should just toss, and fish compost. Perhaps over the winter I could mix in my vegetable scraps? Thoughts and counsel would be much appreciated!