Cold Frame Hoop House Plans and Update

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We had a really warm weekend last week, so i pulled out the cold frame hoop house that we built in the How to make a hoop house cold frame video here. I put in a mix of salad greens and mesclun mix, place a wireless thermometer in, and left it to grow.

Henry and our cold frame hoop house
Henry and our cold frame hoop house. Note the black plastic on the raised bed, helps warm up the beds faster and kill weeds.

I’ve gotten many requests for plans for the cold frame hoop house, and ask that you watch the video, How to Make a Cold Frame Hoop House here, it pretty much explains it. Below i’ll post a few key photos to guide you along. This Cold Frame Hoop House plan is perfect for our raised garden beds. You can watch our How to Make Raised Garden Beds video on our site here.

this is the thermatic vent, it opens and closes automatically
this is the thermatic vent, it opens and closes automatically

For the source of the thermostat vent, this is a vent that is used to vent crawlspaces. I’ve seen them for sale at Lowes and Home Depot and large lumberyards. You can also order them from Charlie’s Greenhouse Supply . Its called a Thermatic Vent.

You can watch our How to Make Raised Garden Beds video on our site here.

build a frame that will fit in your garden bed with 2x4 lumber
build a frame that will fit in your garden bed with 2×4 lumber
use narrow diameter PVC to arch across the frame
use narrow diameter PVC to arch across the frame
use electrical pipe holders to secure pipe arches
use electrical pipe holders to secure pipe arches
cut a plywood end that matches the arc of your hoop house cold frame. cut out a hole for the thermatic vent in the plywood
cut a plywood end that matches the arc of your hoop house cold frame. cut out a hole for the thermatic vent in the plywood
attach the plywood to one end of cold frame
attach the plywood to one end of cold frame
the view of the cold frame hoop house from inside.
the view of the cold frame hoop house from inside.
The cold frame hoop house fits just inside the raised bed. nice.
The cold frame hoop house fits just inside the raised bed. nice.
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Comments

  1. Sarah says

    Hi,
    I am a univ. student and looking to build a small cheap greenhouse that can stand up to snow. I have been watching a lot of videos but so far I see nothing that will not be damaged by snow. What can I do differently from the above.

  2. Eric Gunnar Rochow says

    ‘cheap and stand up to snow’ is a tall order. you might try old storm windows attached at the top to each other with wood or plastic sides. basically a triangle looking cold frame.

  3. Eric Gunnar Rochow says

    i don’t remember, i had a big roll of it in the basement, probably 12 feet wide x 25 feet. thx. eric

  4. Joe says

    Nice concept. Have you found that 1 vent is sufficient in early spring in full sun? Wiggle wire and u-channel would be useful to secure the ends. With wiggle wire and u-channel, we could make the wooden piece lower to allow better sun exposure.

  5. carl says

    Lovely design. How did you attach the plywood to the pvc. The pvc seems so flimsy and moveable. Thanx

  6. aw says

    Does your crawlspace vent still work? Have you had any that don’t open or close correctly in the winter? I really want to try this great option for venting, but would like more info on the reliability of these. Thanks!

  7. Eric Gunnar Rochow says

    the vents work, keep in mind they are only about $20, so i wouldn’t expect these to last many years.

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