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COLD FRAME

Page history last edited by pinkhamc@... 8 years, 1 month ago

I have been using the pit cold frame described in the attachment for over 30 years.  It was originally conceived to be used with several WoW's, each cut at one of its end seems so it forms a flat sheet of tubes rather than a circle of tubes.  Of course I had plenty of WoWs to do that with.  However, I decided to try it without the WoWs and quickly found that just having the cold frame below the ground and absorbing lots of heat during the day was almost always good enough.  On a few nights each spring, the temperature inside would get below freezing.  So rather than lose the use of a few WoWs in my garden, I decided to attach a temperature-sensative, 3-pronged outlet (like the kind used on heat tapes) to my electrical supply.  By placing the outlet outside where it would be exposed to ambient temperatures, plugging a heating pad into that outlet, and putting the heating pad in the cold frame, I am able to safely harden my plants (started inside my house) as soon as I can get them into the cold frame, even when the cold frame by itself was not enough. Normally that means I put my seedlings in it in late March or early April.  Normal planting time in the garden is the end of May.

 

Plans for Cold Frame: cold frame.pdf

 

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