Sorry for the dumb question, but I'm very new at gardening. I'm wanting to plant watermelon and cantaloupe seeds indoors until it warms up a bit outside. Unfortunately I don't know how many seeds per hole I should put in. Some sites have said 3-4, while others say 1. Also is there a chance of cross pollination if I plant watermelons and cantaloupes in the same area? How far apart would they need to be to eliminate this risk?

Thanks so much for your help