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Converting a Cold Frame to a Hotbed: Electric Heating Cable Installation for Seed Starting

Converting a Cold Frame to a Hotbed: Electric Heating Cable Installation for Seed Starting

To speed seed germination and rooting of cuttings, convert your cold frame to a hotbed.

Making a Hotbed

  1. Add electric heating cable.
  2. Base: 2–3 inch layer of sand or vermiculite.
  3. Lay cable: loops spaced 6–8 inches apart, 3 inches from frame sides.
  4. Add 1 inch sand, then window screen or hardware cloth to protect cable.
  5. Most growers add another 4–6 inch sand layer to sink pots of plants.

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