Husband took several pieces of guttering and brackets and hung the guttering on the side of the garage in three rows. He put a little dirt in it; but, so far, I don’t recommend it. Soil’s too shallow; it’s messy (dirt goes down the side of the garage when you water it). I’ve indulged him in this. Only one gutter row actually sprouted. I think it’s a mess and a waste; a lot of trouble to water, but I’m keeping an open mind
Inventors learn from their endeavors. Who knows what your husband may eventually create from his experience with his gutter garden?
I’ve seen gardens like that do well, but only when they were hydro/aquaponic. Soil dries out too fast, as you’ve seen.
Better utilization for a gutter.
https://www.youtube.com/watch?v=GRQzhFBCot4
It does require a little bit of space though.