In a sea of green you look for structure that grows single cola in a tight compact way. Pick your strain based on the single cola and no side branching and you will be fine. Sea of Green works better from clones because if you grow from seed you risk males getting through or having holes when you remove the males. Clones work better because they get most of their age from mom so they can grow to maturity a bit faster and have an easer time growing a single cola.