Shelah Horvitz wrote:If you read extensively in Oehler, he mentions that he has a lot of troubles with gophers. You may or may not, depending where you are. But critters live in the ground, and this must be taken into consideration. Maybe a lining of hardware cloth or some other kind of wire mesh between the soil and the plastic would be helpful.
Also, plastic breaks down over time. Not so that it goes away but so that its structural integrity is compromised and it breaks into microparticles. So you might design so that in ten, fifteen years, it would be accessible to go in and replace the plastic.