Forcing In Hotbeds And Frames
The forcing of asparagus in hotbeds does not differ materially from that
in the greenhouse, except in the supply of heat. "A most suitable place
for forcing asparagus," writes William Scott, in Garden and Forest,
"is a frame about four feet deep with
one-fourth inch hot-water pipe
running around it. About two and one-half feet of fresh stable litter
should be put into the frame and firmly packed, with an inch or two of
sand spread over it. This bed should be allowed to stand until the heat
of the manure has declined to about 70 deg., and not below 65 deg., before
the crowns are placed on it. For this work advantage should be taken of a
day when the weather is mild, as the crowns are easily damaged by frost.
Large crowns five or six years old are preferable to smaller ones for
forcing. They may be placed rather closely together in the frame, but
the distance apart must be regulated by their size. The roots should be
spread evenly over the surface and covered with six inches of sand.
Little water will be required, as the steam from the manure affords
considerable moisture; but if the bed should become dry, it may be
moistened with water of the same temperature as the soil in the frame. A
little air may be admitted, when the day is bright and warm, to keep
the temperature from rising above 80 deg. When the points of the shoots
begin to appear above the sand the crop is ready to cut. When ground is
plentiful, a supply of forcing crowns can be kept up by sowing a little
seed every year, having five or six successions, the oldest plants being
forced for cutting."
With French gardeners it is customary to plunge the frames in warm
stable manure and place the roots directly in the manure, packed as
closely together as possible. A mere sprinkling of soil is placed over
them. As a result the shoots come up very thick. Only strong, fine
three-year-old roots are used, and as many as five crops of roots follow
each other through the autumn, winter, and spring in the same frame.
Straw mats are used to cover the frames at night.
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Next: Forcing In The Field
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