I'm deciding on buying a few feminised. And using the rest of my money to buy some reg. seeds, And I'm gona be putting about 15 in 3 spots, 30 in 1, and 40 in another that's densely covered and remote, what should I use to store water in the dirt, what kinda method is the best and cheapest? ANd how many of my fem. seeds will actually be full female and not hermie? 16/20 or less?