I'm going to begin a new batch. I've ordered seeds from Attitude that also gave freebies. If I'm going to grow maybe 3 strains, like 2 or 3 plants of each strain, is it better to grow strains that are of equal height for lighting purposes? flowering times? Or what should I consider when growing several strains at once? Seeds are listed as tall, medium, or short. Attitude had a good promotion this month!