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Cold Frame For Starting Seeds?

13 years ago

I want to build an approx. 2x4 cold(hot) frame to use for starting seeds to transplant to the garden later. I live in zone 7 and it gets pretty cold here at times. A hotbed is a little too much for my needs. I would be starting 2-3 flats only. What could I use to heat it? I've looked at soil heating tapes and heat mats but don't know how much heat they would provide to the interior. The bottom will be open and the frame will be sitting on a brick patio. I don't know a lot about this. Any better ideas or suggestions?

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