Plants turning Yellow Toward the buttom...

Oh shit will do! I'm getting rid of them immediately! (the ones with balls)

Haha that last poster knew what he was talking about.

1. Reinforce your stem by burying your root ball a 4-5 inches further down the container and cover your stem this will stengthen your stem and build root mass around the stem thats submerged

2. Get rid of those males.