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  • Leslie Kramer

    Cold frame 1. Start by selecting a cover, since its size will often determine the dimensions of the frame. Good choices include an old window sash or storm window; if you don't have one on hand, look for recycled windows at garage sales. You can also make a cover out of clear acrylic or fiberglass sheets sandwiched between narrow strips of wood and reinforced at the corners with metal corner plates. Polyethylene film stapled to a wooden frame is another option; it's quick and inexpensive, though it lasts only a year or so. Make sure the cover isn't too heavy to lift easily. Don't make it too wide, either, or you'll have a hard time reaching the plants inside the frame; a width of 2-1/2 to 3 feet is ideal. A length of at least 4 feet will allow you to grow a variety of plants. Build the frame from lumber, such as rot-resistant redwood or cedar or less expensive plywood or scrap lumber. The frame should slope from about 1-1/2 feet high at the back to a foot high at the front; this traps the most heat and lets rainwater run off. For strength, reinforce the corners of the box with vertical posts. Attach the cover with galvanized steel hinges and apply weather stripping around the top edges of the box. 2. Ventilation is vital to prevent overheating. A minimum-maximum thermometer is useful for keeping track of temperature fluctuations. Plan to prop open the cover when the temperature inside reaches 70 degrees to 75 degrees F/21 degrees to 24 degrees C. Close the cover in late afternoon to trap heat. (If you won't be around during the day, you can buy a nonelectric vent controller that will automatically open and close the cover at a preset temperature.) On very cold nights, drape the frame with an old blanket or piece of carpet to provide extra insulation.

  • Nutrients for Life Foundation

    DIY cold frame boxes and lots of backyard projects #garden

  • Sarah Matteson

    Mini green house boxes for critter protection!

  • Sarah Benson

    Cold frames. Used to protect tender plants or rooted cuttings during the colder months, a cold frame is simply a box with a transparent lid or cover. It acts as a passive solar energy collector and reservoir. (From Sunset Magazine)

  • Josselyn Freeman-Estey

    Cold frame instructions. Mini greenhouse?

  • Erica SassPants Ryan

    Mini greenhouse? Another good garden idea to keep the dogs out.

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Love this cold frame to plant my vegi's & herbs, we will try building next year.

another great cold frame garden design idea I like the the way the cover is designed on this... a super way to grow veges during the WINTER.

Using the side of a building for cold frames. Microclimate genius!

cold frame -- Ah-ha! THIS would work perfectly in my long, narrow, bowling alley garden that lives up against a fence.

DIY greenhouse - I might try to make this so that I can plant earlier in the season or as a way to start more plants from seeds.

You don't always need to build a big green house, why not try a mini greenhouse made from recycled bricks & windows

Tuinieren heeft vele voordelen. Hier is een moestuintje voor de urban girl, fantastisch dit!

I fantasize about having a reading greenhouse full of cacti in my earthship or treehouse dream home

*Greenhouse Boxes...from old windows & wood. Fun and cinchy. would also work with an old door to hang pots or whatever... i like!

Hopefully my winter garden will look this good. You can't get anymore local than your own backyard! #ultimatethanksgiving

I want to make these but heavy duty, with handles to move them more easy, possibly wheels... Has to be able to moved easily... awesome when you dont have room for a full size greenhouse!