I do mine like this...

V-V-V-V-V
-V-V-V-V-V
--V-V-V-V-V
---V-V-V-V-V

It's diagonal rows & have at least 5 new plants each day..I don't leave any holes, they grow in between the plants. Kind of like a checker board, but my rows of all 1 kind are diagonal. Hope this helps