Cold Frame, Hot Bed Construction and Use

[Cerwin]

Cold Frame, Hot Bed Construction and Use



Hot beds and cold frames are used by gardeners for propagating
vegetables, flowers and ornamentals. Hot beds are used for starting
the plants and cold frames for tempering or hardening plants to
outdoor conditions before transplanting. For most home gardeners the
same frame can serve both purposes. The principle difference between
the two is that hot beds have a heat source. Traditionally, hot beds
and cold frames were built even with or slightly below ground level
and covered by glass sash. Present-day frames are often completely
above ground and plastic covered because film is generally available
at a reasonable cost.




Location

Hot beds and cold frames should always be located on well-drained
soil, free from flooding during heavy rain. A location with a southern
exposure and adequate wind protection on the north and west is ideal.
Locate close to water and heat sources.


Size

Almost any size hot bed can be electrically heated; however, most are
from 5 to 6 feet wide and 6 to 12 feet long. The ultimate size is
dependent on planting requirements, kinds of plants, number of plants
and spacing. If glass sash will be used to cover, the length is
usually in multiples of 3 feet; however, plastic coverings do not
limit dimensions.


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