
01/23/13, 07:15 AM
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I grow cold tolerant greens, peas, carrots, cabbage, stuff like that in mine. At this time of year, I start a fire if it's going to be really cold. For instance, it's 15 degrees here right now, so I started a fire around 5:00 yesterday evening and loaded the stove up and shut the dampers down around 9. There is still smoke coming out of the stovepipe, so I don't need to worry. When I pot up tomatoes and such, I take them out to the greenhouse once they've broken the surface because they get a lot better quality of light than if I keep them under a grow light. Tomatoes, peppers, etc are extremely sensitive to cold, so its pretty important not to let them set out if it's going to get below freezing inside your greenhouse. If you have one of those thermometers that show the high and low for the past 24 hours, you can use that to compare the temperature inside the greenhouse to that outside, so that you would know, for instance, that a forecast low of 20 may mean a low of 30 inside your greenhouse. I wouldn't accept any literature on how much heat is retained, I would find out myself. Something as small as what you're considering, probably a small electric heater would keep quite warm. You might need to find an inline plug in thermostat designed for low temperatures.
Last edited by zong; 01/23/13 at 08:29 AM.
Reason: spell check lets in a lot of wrong words.
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