I'm wondering if anyone has done this before and has had any success. I am setting up a dahlia garden 8 x 16 in a spot which used to have grass. I am digging out the grass and going down about two feet. In order to retain water I was going to line the bottom with plastic, cut holes for drainage and then fill up the area with dirt. My two concerns are, is 2 feet deep enough for a dahlia and even with holes in the bottom do I run the risk of having the dahlia tubers rot?
- posted
20 years ago