I’ve been using a different weighted plastic this year to get me through the winter. Usually I’ve used a 6-mil plastic but now I’ve got a heavier duty commercial plastic covering my square foot gardens. The sun came out early today and it was 43 when I got home from work. I’d been used to plastic covers increasing the temps about 30 degrees warmer than the outside air. The thermostat showed about 82-a 40 degree increase. There’s a lot of things that can grow at that temperature, and the things growing under there right now probably aren’t the ones that can. I had to make sure that I vented it-in this case I just pulled the plastic off about half-way so it stayed fairly warm underneath but protected from the wind. So far things are growing nicely under the plastic-regardless of the harsh winter we’ve been experiencing.
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