Ground Unit

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cold frame
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snow pi.JPG
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Early Pumpkin.JPG
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199.JPG
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tree2.JPG
mother earth photo.jpg
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189.JPG
tom.jpg
cold frame
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277.JPG
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Smirfitt.JPG
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Ground Unit

210.00

The original design from the spring of 2010. Start your seeds early, harden off your seedlings or grow into the fall and winter over plants until spring.

Western red cedar and corrugated polycarbonate

50"Wide x 28"Deep x 24" High

Six manual locking vent adjustments

 

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The protection of a Cedar Cold Frame allows your plants to withstand high winds, cooler temperatures, and heavy rain or hail. Start your seeds early, harden off your seedlings, and extend your growing season through the fall into the winter.  Our cold frames are constructed with Western Red Cedar for its rot/pest/UV resistance, corrugated polycarbonate because its durable and UV resistant ( stays clear for up to 20 years ) and the corrugated pattern allows the material to be more flexible , galvanized and stainless steel fasteners to add to the longevity. The use of galvanized roofing screws with neoprene washers with a seamless polycarbonate lid prevents water from getting to the wood framing. For convenient temperature control there are six locking vent adjustments when open and latches to secure the lid when closed.

Product Specifications

  •  Length  49"
  •  Width 28"
  •  Height 24"
  •  Weight: 28lbs
  •  Western Red Cedar Framing
  •  Naturally rot and UV resistant
  •  Corrugated Polycarbonate lid and sides
  •  92% light transmission
  •  Co-Extruded UV protection prevents yellowing
  •  Anti-condensation control
  •  Impact resistant, shatter proof
  •  Galvanized and stainless steel fasteners
  •  6 locking manual vent adjustments
  •  Latches for securing lid when closed
  •  Easy assembly

We recommend installing the cold frame 3-4 inches into the soil to anchor and seal the base, this helps maintain warmer temperatures and is more secure under severe weather conditions. Temperatures can be up to 20 degrees warmer inside. Other options are to fasten the cold frame to a wood raised garden bed, drive stakes into the ground and screw them to the corners, or simply place a heavy object on the top ( even when vented ). Weighing only 28lbs this cold frame is designed to be moved easily whether your amending soil, changing garden layout, or finding a better spot for sun exposer.  

Installation

  • Pick a location with the most sun exposure during the spring and fall.  A raised bed
  • or mounded soil will help with drainage. 
  • Till the soil and amend as needed.
  • Dig or rake a 3-4in deep trench in the shape of the base of the cold frame.
  • Place the cold frame into the rectangular trench and push down firmly on all corners until level and the lid is square and flush when closed.
  • Push loose soil four inches high around the outside of entire cold frame (sloping away) and pack down firmly.  This is for proper insulation, securing the cold frame, and water drainage.
  • Make sure the inside soil level is slightly higher than the outside soil level.

Using your cold frame for direct seeding

  • In early winter, shut the cold frame to allow the heat to build up and warm the soil under the cold frame.  This will prepare the soil for seeding.
  • Level the soil inside the cold frame and plant seeds leaving the lid closed until the seeds have germinated.
  • After seeds have germinated and when the daytime temperatures are to reach 45 degrees and sunny, use the locking vent props to optimize temperatures. If the temperatures are not to drop below freezing, keep vented day and night.
  • For plants which like warmer temps, tomatoes/peppers, keep the lid closed at night all spring.
  • On cold or windy nights, close and lock the lid in mid afternoon.
  • If hard frost is expected, use a wool blanket to cover the cold frame for the night or place an electric heat mat on the shelf.
  • When daytime temperatures are exceeding 80 degrees, use the large vent props or remove the hinge pins and lid for the hot summer months.
  • When working inside the cold frame, use the large lid props and lock them into place.

Using your cold frame for holding starts and fall/winter gardening

  • In the spring, grow seedlings in containers until they are ready to be transplanted into the garden.  Wait until the cold nights have gone and plants are well established.
  • For growing a fall/winter crop, directly seed the soil in the early fall with cold hardy varieties such as spinach, chard, lettuce, onions, radishes, cilantro, parsley etc...
  • As the cold temps come, keep the lid shut to create a warmer climate through the winter, slightly vent if needed.
  • From October - March, watering needs will decrease as the outside soil is normally saturated.
  • Harvesting and watering should be done in the middle of the day to minimize heat lose during winter months.
  • Perennial herbs and plants can be wintered over inside the cold frame either directly in the soil or containers.
  • Mulching in your plants for the winter will insulate the root systems and base of the plant, keeping the plants warmer, growing, and more healthy.
  • If hard frost is expected, use a wool blanket to cover the cold frame for the night or place an electric heat mat on the shelf.