cold frame

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cold frame,

in horticulture, sun-heated board frame covered with a removable top of glass or other transparent material and sunk into the ground. The top may be solid or slatted or screened for shade. The cold frame is used to start seedlings in early spring (four to six weeks before the average frost-free date), to harden seedlings or plants removed from greenhouses or hotbeds, and to protect plants during the winter. A hotbedhotbed,
low, glass-covered frame structure for starting tender plants. It differs from a cold frame only in that the soil is heated—either artificially as by underground electric wiring or steampipes, or naturally with partially fermented stable manure, which is mixed with
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 is an artificially heated cold frame.

cold frame

Horticulture an unheated wooden frame with a glass top, used to protect young plants from the cold
References in periodicals archive ?
Inspired by a friend's project, retired garden educator Lisa Wagner created several versions of cold frames from matching double-pane windows purchased at a local Habitat for Humanity ReStore (see bottom-left photo on Page 75).
Traditionally, resourceful growers have constructed cold frames from scrap materials and used them on farms or in gardens.
As opposed to a greenhouse, a cold frame is cheaper and takes up less room.
Chinese cabbages as well as red and green cabbages and mustards grow well in cold frames.
With the arrival of hot weather, many gardeners take the windows off their cold frames and replace them with shade cloth, a porous plastic sheeting that blocks out part of the light.
And why should they, when they can create their own microclimate in an inexpensive cold frame.
By transplanting your indoor plants into cold frames, you will help them assimilate and prevent excessive shock.
In the past cold frames frequently used old window sashes with single-pane glass.
If they're in a propagator over winter they should be ready to plant by spring but those in a cold frame will normally need until autumn before their roots have grown sufficiently.
Continue to sow carnations, pinks and other dianthus varieties in cold frames or an unheated greenhouse.
Keep an eye on plants in cold frames, watching out for slugs and rotting leaves.