I've accumulated several fermenters over the years that I no longer feel comfortable fermenting in. I hate to see anything go to waste when it can be repurposed. so I cut the bottoms out of the fermenters and use them as hot caps in the garden. It's nice to get an early start without worrying about frost killing young plants. My wife has put them over her herbs in late fall and has a great survival rate. Here in the high desert the rule of thumb is not to plant anything but root crops before Mothers' Day, for fear of a late frost. With the mild Winter we've had this year I decided plant a couple of tomatoes yesterday and used old carboys to protect them. I push the carboys about 8" into the ground so the wind doesn't blow them off. You can also use buckets if you cut to bottom out, put them around the plants and secure Saran Wrap over the top. After growing our own for many years, we don't buy tomatoes. Even the best you can buy in your local super market don't compare to home growns, so an early start means the first BLT will come early.