Sand vs. compost
I know this question seems like a no brainer but...I'd like some input just the same.
In Mel's new book he states that I only need 6 inches of his mix and any thing deeper than 6 inches can be filled with sand up to the 6 inch mark and use his mix on the top.
I've been having this debate with myself...use sand as my bottom filler or use 100% compost from my local landfill. I'm thinking that the 100% compost would actually be better for my plants than the sand even though I'm going to use Mel's mix for the top 6 inches no matter what.
All my boxes are going to be 12" deep. I know that isn't necessary either but that is just my own personal little pet peeve, I like the deeper boxes.