Also on these boards
Cut the bottom off a plastic pot to contain invasive plants & bury in the ground. I have been doing this for a few years & works great for containing plants that tend to spread, but that you still want to plant in the garden. Great idea.
submerged pots in the ground to control spread of plants - Looks so clean.
Organic Gardening - growing seedlings in recycled containers as greenhouses (salad greens tub and toilet paper tubes!)