A cold frame is a wooden frame with a glass top in which you grow small plants to protect them from cold weather.
cold frame in British English
noun
an unheated wooden frame with a glass top, used to protect young plants from the cold
cold frame in American English
an unheated, boxlike, glass-covered structure for protecting young plants outdoors
Examples of 'cold frame' in a sentence
cold frame
Garden centres sell mini greenhouses and cold frames that are perfect for the job.
Times, Sunday Times (2015)
Scatter a shallow layer of horticultural grit over the top and leave the pots in a cold frame or cold greenhouse.
Times, Sunday Times (2007)
When they are an inch high, move to a cold frame or cold greenhouse.
Times, Sunday Times (2013)
This can be done in a greenhouse, cold frame or outside covered with horticultural fleece.
Times, Sunday Times (2014)
CHECK all plants in greenhouses and cold frames.
The Sun (2006)
On a mild day lift out all the plants and brush and scrub the greenhouse or cold frame, inside and out.
Times, Sunday Times (2010)
A cold greenhouse or cold frame is the ideal intermediary, but you can use layers of horticultural fleece instead.
Times, Sunday Times (2012)
We're now the proud owners of a greenhouse with cold frames, a tree house and a sandpit.
Times, Sunday Times (2008)
If you have a greenhouse or cold frame in your garden that's perfect but don't worry if not.
Times, Sunday Times (2014)
Now the sun is gaining strength, cold frames and greenhouses quickly build up warmth in sunny spells, filling the soil with heat that is then released overnight.