Can you tell me the best way of storing seeds that I collected from my own plants last year?
Carl Browne, by email
Stefan says: The two real enemies of stored seed are damp and heat. The best way to store your seeds is in small paper packets in a screw-topped glass jar, then keep them in a fridge.
If you have some small sachets of silica gel drying crystals, put these inside the jar along with the stored seeds. You’ll find that most kinds will stay viable for at least a few years and some, like onions, for many.