Sea of greening allow's you grow a lot of plant's in a small place. It's where you start the flowering process while the plant's are still small (in height). And then they will finish up quite small and won't require as big a pot to grow in so then you can fit more plant's in a small place.

I think you have two option's.

1) Grow a couple of big plants.

2) Grow six little one's.