Our weather is unpredictible and subject to frost every month of the year. This past summer I only had 3 weeks without frost and a green house really comes in handy. My neighbor Bob Bang created a line of greenhouses that hold up to our 100 mile w-i-n-d-s (I don't even like to say the word out loud so I spell it) our crazy -40 below winters and the hot sunny days we get during the summer. It is double layered with a fan that blows air inbetween the 2 layers of plastic. I can grow almost year round. We picked chard and aragula over Christmas and will be planting broccoli, cabbage, and cauliflower the end of February. Having a green house is the only way I can grow tomatoes. I am hoping to get several more so I can offer a bigger variety to my CSA customers.