Simon Tocker @binaryjam.tocker.co.uk · Jul 26 Just fresh out of the hot bath canning pot, home made blackberry and apple (seedless) jam. 1 likes 1 replies ? Reply Replies Simon Tocker · Jul 27 Today I learned that you can overset jam. Blackberries and apples have high pectin and quickly becomes ready. It can be reheated and add water etc, but all that sterilisation again. So I have very stiff tasty jam.