Don't know if you can tell from the pictures, but mine is a completely container-based plan. I use large grow-bags on each side of both tunnels, and set up the tunnels within the rows because I need them for vining veggies to save space in my tiny garden. I've not been limited in what will grow to full capacity in them, but they are all at least two feet in diameter and I do make sure the soil is freshly fed and mulched each year.
