ew essentials are observed.
Single-eye cuttings are made in the fall and are stored in sand until
late winter, about February in New York. At this time the cuttings are
planted horizontally an inch deep in a sand propagating bench in a
cool greenhouse. If the cuttings are not well calloused, they remain
one or two weeks in a temperature of 40 deg. to 50 deg. without bottom heat,
but well-made cuttings are calloused and ready to strike root so that
brisk bottom heat can be applied at once. After six weeks or two
months, the young plants are ready to pot off or to transplant in a
cold-frame or cool greenhouse. If but a few plants are to be grown,
they may be started in two- or three-inch pots, shifting into larger
pots once or twice as growth progresses. In early summer, the young
plants are set in nursery rows out of doors and by fall the young
vines should be strong and vigorous.
Single-eyes are also started in hot-beds, cold-frames and even in the
open air without the aid of artificial heat. In hot-beds and
cold-frames, the method is only a modification of that described for
greenhouses. Out of doors the cuttings are given the same conditions
under which long cuttings are rooted, except that the whole of the
short cutting is buried an inch deep in the nursery row.
HERBACEOUS CUTTINGS
Grapes are easily propagated from herbaceous cuttings, although since
the vines are weak and the method expensive, they are seldom used.
Green cuttings are usually taken from plants forced in greenhouses,
but may be taken in summer from vineyard vines. A green cutting is
usually cut with two buds with the leaf at the upper one left on. The
cuttings are set in propagating beds of sand, or pots of sand, in
close frames under which there is brisk bottom heat. To prevent
excessive evaporation, the frames are kept closed and the atmosphere
warm and moist. As growth progresses, or if mildew appears, the frames
are more and more ventilated. In two to four weeks, the cuttings
should have rooted sufficiently well to be transplanted to pots.
Herbaceous cuttings made in the summer must be kept under glass until
the following spring.
LAYERING
The grape is readily propagated from layers of either green or mature
wood, the method being certain, convenient and producing extra
vigorous plants. The drawback is that fewer plants can be obtained by
layering than from cuttings with a given amount of wood. Varieties of
some species, however,
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