a bottomless, boxlike structure, usually covered with glass or transparent plastic, and the bed of earth that it covers, used to protect plants.
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How to use cold frame in a sentence
In the spring a mild hotbed, a cold frame or a nursery bed in the garden may be used, according to the earliness of planting.
The nuts from these crosses were stratified in sand in a cold frame, dug up, and planted in the greenhouse in early March.Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting | Northern Nut Growers Association
Seed is sown in early spring, either in a cold frame or in the open ground, and the seedlings transplanted in early summer.
The drills may be made in a cold frame during March or in the open ground during April.
A fair return from a cold frame to which the plants have been transplanted ranges from $3 to $7 during the winter months.
British Dictionary definitions for cold frame
an unheated wooden frame with a glass top, used to protect young plants from the cold
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012