I planted 12 Spacemaster Cucumber seeds but only 9 came up. Before I planted them I presoaked them in a cup of water, and noticed one floated to the top while two stood on end instead of lying flat on the bottom of the cup of water. I don't know which ones came up, but is it a good idea to discard any cucumber seeds, or for that mater any kind of seeds that float to the surface if dropped in a cup of water so you don't waste your time on dead seeds? I know I read that when saving tomato seeds you are supposed to discard any seeds that float to the top of the fermenting liquid.