Your choice of winter-hardy vegetables is key to ensuring that they can handle whatever the weather may be. These techniques help to insulate your crops from the cold weather, but they won't change the environment enough that you can grow summer-fruiting crops like tomatoes and melons. The water absorbs heat during the day and, even when frozen, protects the plants inside (think of an igloo) A variation on this involves the container having walls filled with water. Seedlings and young plants get established better in this environment. You may need to vent the air in the box on warm days during the winter.Īn old technique involves placing a clear glass or plastic bowl with a wide lip over each plant. For example, if you are in Zone 6, the cold frame could allow you to grow like it is in Zone 7. A well-made cold frame can shift your USADA growing zone up by one zone. The structure can be buried in the ground and collects the sun's heat during the day. Seller Rating: Contact seller Book Used - Softcover Condition: Fair US 13. A cold frame consists of a box with a clear sloped lid, usually glass or plastic. Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long, 2nd Edition Coleman, Eliot Published by Chelsea Green Publishing, 1999 ISBN 10: 1890132276 ISBN 13: 9781890132279 Seller: Book Deals, Tucson, U.S.A.
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