bigdog

Sure! I'm going to be laying out some 6 mil clear plastic very soon to warm the soil up for planting. Any advantage I can gain, I will try. Just make a good seal where the plastic meets the ground (bury the edges in soil), and leave a little slack underneath so it will have a little room to grow. I imagine you could start doing it a little before the threat of last frost. You could even do it a little earlier, but be prepared to protect against a late frost. Once it gets going, I'd remove the plastic to avoid fungi.