A few years ago we built a long planter in our garden. Whilst filling it up, my lovely DH used the soil that I had been using to (unsuccessfully) grow potatoes. This soil also contained the dead plant and old tubing potatoes. Now a few years later, we're fighting a losing battle with potato plants sprouting up everywhere, and they're now growing on the edge of our lawn...please give me advice on how we can kill them off? Or at least control them?!