The Nursery-Book: A Complete Guide to the Multiplication and Pollination of PlantsBailey, L. H. (Liberty Hyde)
Science
The Nursery-Book: A Complete Guide to the Multiplication and Pollination of Plants
Bailey, L. H. (Liberty Hyde)
Plant propagation
In making cuttings from soft and growing shoots, the first thing to
learn is the proper texture or age of shoot. A very soft and flabby
cutting does not grow readily, or if it does it is particularly liable
to damp-off, and it usually makes a weak plant. Too old wood is slow
to root, makes a poor plant and is handled with difficulty in many
species. The ordinary test for beginners is the manner in which the
shoot breaks. If, upon being bent, the shoot snaps off squarely so
as to hang together with only a bit of bark, as in the upper break
in Fig. 51, it is in the proper condition for cuttings; but if it
bends or simply crushes, as in the lower portion of the figure, it is
either too old or too young for good results. The tips of the shoots
of soft-wooded plants are usually employed, and all or a portion of
the leaves are allowed to remain. They are inserted in sharp sand
to a sufficient depth to hold them in place, and the atmosphere and
soil must be kept moist to prevent wilting or "flagging". The cuttings
should also be shaded for the first week or two. A propagating-frame
is often employed. Soft cuttings are commonly cut below a bud or
cut to a heel, but this is unnecessary in easily rooted plants like
geranium, coleus, heliotrope, etc. Fig. 52 shows an oleander cutting
at _a_, a carnation at _b_, and a geranium at _c_. A coleus cutting is
illustrated in Fig. 53. Sometimes the growth is so short or the stock
so scarce that the cutting cannot be made long enough to hold itself in
the soil. In such case a toothpick or splinter is tied to the cutting
to hold it erect, as in the cactus cutting, Fig. 54, or the geranium
cutting, Fig. 55. In the window garden, soft cuttings may be started
in a deep plate which is filled half or two-thirds full of sand and
is then filled to the brim with water, and not shaded; this method,
practiced on a larger scale, is sometimes useful during the hot summer
months. If bottom heat is desired, the plate may be set upon the back
part of the kitchen stove. Oleanders usually root best when mature
shoots are placed in bottles of water.
[Illustration: Fig. 52. Soft cuttings.]
[Illustration: Fig. 53. Coleus cutting.]
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