Here's a good source for those copper-lined growing bags!
Jay's the man!
I was just going to say to tell him "Hey Jay from Hey_j"!
I crack me up--didn't even see that one coming till I finished the thought!!
I highly recommend these bags if you have the problems I'm having and will have even more when we move--root competition from anything that grows vigorously looking for the water you're putting on your hosta!! The copper stops the roots dead in their tracks!
Be sure to turn the bags inside out putting the seamed side in! They ship just the opposite with seams out! If you turn back the tops to make a cuff you should have the light grey flannel sort of side out, while the whole rest of the outside material looks dark charcoal with a sheen..
Here is a link that might be useful: Horticulture Specialties--Jay's the man!!