Q: A gardener friend moved and left me with several bags of ingredients for making potting soil. I have never made potting soil before. What proportions should I use? Do these ingredients go bad at some point?
A: First, I want to make a slight distinction between potting soil and potting mix. When you use the word soil, it implies that one of the ingredients will be soil, either from the garden or dug up from somewhere else. So potting soil includes some dirt.
