First time growing, what to do at end of season?
This year I decided to expose my young son to the world of gardening (and also myself). Since we are apartment dwellers we had to use containers. We've been using plain old MG potting mix in 4 and 5 gallon plastic buckets (one bucket has some clay soil that we dug up) and are successfully (so far) growing some tomatoes, carrots, peas and pumpkins.
My desire is to use all this potting mix again next growing season to save some money. Could I simply add some compost to make up for lost levels of the potting mix and nutrients? Would it be advisable to save the plants and roots once the food is harvested and let them decompose into the potting mix?