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Questions tagged [cold-frame]

6 questions
15
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4 answers

How to automatically vent a cold frame during the Winter?

I am working on building a cold frame and have purchased a Univent automatic opener to vent the cold frame by lifting the lid/light. However the Univent opener is not supposed to subjected to freezing temperatures or it will break. That is…
spesh
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6
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3 answers

What thickness of twinwall polycarbonate should I use for my greenhouse?

I bought a cheap grow house with 4 shelves for growing herbs but the wind has knocked it about and it is starting to lean to one side a bit more than it should. I plan to build a wooden frame, to remount the shelves on and use twinwall polycarbonate…
Morgan
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5
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2 answers

Is it a bad idea to put seedlings in a cold frame?

I made a cold frame out of $5.00 worth of lumber and some saran wrap. I don't know if it necessarily deserves the title "cold frame", but I want to use it as a place that is protected from the elements where I can sprout and keep seedlings during…
Peter Turner
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3
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Improving heat retention and light availability of coldframes

I am currently planning on building some grow-houses/cold frames. Actually mostly raised beds 18" (45cm) high, with the ability to fit panels over it in winter turning them into cold frames. The rear wall will be north facing and against the…
Morgan
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1 answer

Are green plastic bottles suitable for making a cold frame/greenhouse?

I've been saving up green plastic bottles for a few weeks now with the vague intention of recycling them to make a cold frame or greenhouse. Are green bottles ok to do this with, or would they need to be clear plastic bottles?
Danger Fourpence
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Cold frame for starting seedlings

I live in Sacramento, CA (zone 9b). Winters are mild. Dec/Jan average temps range from 55F - 40F during day/night. However, depending on year, we can get some frost from mid Dec - mid Jan. I would like to start seedlings (marigolds, zinnias,…
user4979733
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