I'd ditch the black plastic idea. IMO it cooks your plants' roots. Get hubs to make you a raised bed. I know, I know, your garden is huge. You'll have your weed problem whipped and more veggies than you can ever use!
I have to go fetch the kids. BBL.
LOL!!!! My garden, a raised bed????? FUGGEDABOUTIT. No way in heck wold hubby timber that in - are you aware of the price of lumber right now? Let alone all that topsoil?
Sweetie pie - we're talking about more than 1/3 of an acre - closer to a half acre.