Phaseolus multiflorus
Runner beans need generous cultivation and will amply repay for the most
liberal treatment. The main point to be borne in mind is that the plant
possesses the most extensive root-system of any garden vegetable. Deep
digging and liberal manuring are therefore
essential where the
production of the finest crops is aimed at. If possible the whole of the
ground to be allotted to Runners should be deeply tilled and well
manured in autumn or winter. But where this is inconvenient, trenching
must be carried out in March or early April. Remove the soil to a depth
of two feet, and the trench may be two feet wide for a double row of
Beans. Thoroughly break up the subsoil, half-fill the trench with
well-rotted manure, and restore the surface soil to within a few inches
of the level.
Time of Sowing.--It is seldom advisable to sow Runners in the open
before the month of May is fairly in, for they are less hardy than Dwarf
Beans, but as late supplies are everywhere valued it is important to sow
again in June. Of course these late crops are subject to the caprices of
autumnal weather, although they often continue in bearing until quite
late in the season. In districts where spring frosts are destructive,
and on cold soils or in very exposed situations, plants may be raised in
boxes for transferring to the open ground, as advised for Dwarf Beans,
but in the case of Runners allow a space of three inches between the
seeds.
Distances for Rows, &c.--Frequently the rows of Runner Beans are
injuriously close, and the total crop is thereby diminished. On deep,
well-prepared soils, single rows generally prove most productive, and
they should be not less than five feet apart. But where the soil is
shallow and generous preparation is not possible, and in wind-swept
positions, double rows, set nine inches apart, are more satisfactory.
Between the double rows allow a space of from six to eight feet, on
which Cauliflower, Lettuce, or other small-growing subjects may be
planted out. Two inches is the proper depth for putting in the seed, and
it is a wise policy to sow liberally and eventually to thin the plants
to a distance of from nine to twelve inches apart in the rows.
Staking.--It will always pay to give support by stakes, but where
these are not available wire netting or strands of stout string make
efficient substitutes. Immediately the plants are a few inches high,
insert the sticks on either side of the rows and tie them firmly to the
horizontal stakes placed in the fork near to the top. The means of
support should be decided upon and erected in advance of planting out
Runners which have been raised in boxes, thus avoiding any risk of
injury to the roots.
But Runners make a good return when kept low by topping, and without any
support whatever, a system adopted by many market gardeners. For this
method of culture space the plants one foot apart in single rows set
three feet apart. Pinch out the tips when the plants are eighteen inches
high and repeat the operation when a further eighteen inches of growth
has formed.
General Cultivation.--As slugs and snails are particularly partial to
the young plants, an occasional dusting of old soot, slaked lime, or any
gritty substance should be given to render the leaves unpalatable to
these pests. During drought copious watering of the rows is essential,
especially on shallow soils; spraying the plants in the evening with
soft water is also freely practised and this assists the setting of
flowers in dry weather. A mulch of decayed manure will prove of great
benefit to the plants and will prolong the period of bearing.
In some gardens Runners are grown in groups running up rods tied
together at the top, and when these groups are arranged at regular
intervals on each side of a path, the result is extremely pleasing. This
mode of culture interferes to a very trifling extent with other crops,
and the ornamental effect may be enhanced by growing varieties which
have white, red, and bicolor flowers.
Preserving the roots of Runners is sometimes recommended. We can only
say that it is a ridiculous proceeding. The utmost care is required to
keep the roots through the winter, and they are comparatively worthless
in the end. A pint of seed will give a better crop than a number of
roots that have cost great pains for their preservation.
Runner Beans for Exhibition.--Although fine specimens fit for
exhibition may frequently be gathered from the general garden crop, a
little extra attention to the cultivation of Runner Beans for show work
will be well repaid. When staged the pods must possess not only the
merit of mere size, but they should be perfect in shape and quite young.
Rapid as well as robust growth is therefore essential to success. Select
the strongest-growing plants in the rows, and for a few weeks before the
pods are wanted give alternate applications of liquid manure and clear
water. Pinch out all side growths, and limit the number of pods to two
in each cluster.
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