Soil and its Treatment.--Loam is a mixture of clay and sand. When
the former predominates it is termed heavy loam, and when the latter
abounds it is called light.
Marl is a compound of chalk and clay, or chalk and loam. Though
suitable for certain fruit-trees and a few other things, few flowers
will grow in it.
Drainage is one of the most important considerations in the
cultivation of flowers. Should the soil be clayey, and hold water,
make V-shaped drains, 3 ft. below the surface, and let 2-in. pipes
lead to a deep hole made at the lowest part of the garden and filled
with brick rubbish, or other porous substances, through which the
water may drain; otherwise the cold, damp earth will rot the roots of
the plants.
Trenching is the process of digging deep, so as to loosen and expose
the soil as much as possible to the action of the air. If this is done
in the autumn or early winter to a new garden, it is best to dig it
deep, say about 2 ft, and leave it in large clods to the pulverising
action of the frost, after which it is easily raked level for spring
planting. If the clods are turned over the grass will rot and help to
improve the ground; new land thus treated will not require manuring
the first year. Should the ground be clayey, fine ashes or coarse sand
thrown over the rough clods after trenching will greatly improve it.
Digging should be done when the ground is fairly dry, and about one
spade deep. Avoid treading it down as much as possible.
Hoeing must be constantly attended to, both to prevent the soil
becoming exhausted of its nourishment by the rapid growth of weeds,
and because when the surface becomes hard and cracked the rain runs
through the deep fissures, leaving the surface soil dry and the roots
of the plants unnourished.
Mulching consists in spreading a layer of stable manure, about 3 in.
deep, over the roots of trees and plants in the autumn to keep them
warm and moist. The manure may be forked into the soil in the spring.
Watering the plants carefully is of great consequence. Evening or
early morning is the best time, and one copious application is far
better than little and often. Water may be given to the _roots_ at any
time, but should not be sprinkled over the leaves in a hot sun nor in
cold weather. Plants having a soft or woolly foliage should never be
wetted overhead, but those with hard and shiny leaves may be freely
syringed, especially when in full growth.
Solanum.--Showy greenhouse shrubs, some of which have ornamental
foliage. The soil in which they are grown should be light and rich.
Cuttings planted in sand under glass strike readily. The tender annual
varieties may be sown on a hotbed in spring, and placed in the border
at the end of May in a dry, sheltered situation, where they will
flower in June. Height, 1 ft. and upwards.
Soldanellas.--These small herbaceous perennials should find a place in
all Alpine collections. They grow best in sandy peat, or in leaf-mould
with a liberal addition of sand, and they require a moderate amount of
moisture. They may be increased by dividing the roots in April. They
flower from March to May. Height, 4 in. or 5 in.
Solidago (_Golden Rod_).--A useful hardy perennial for the back of
borders. Throughout late summer and autumn it produces masses of
golden flowers. It is not over-particular as to soil, and may be
increased by dividing the root in the spring. It increases very
rapidly. Height, 2 ft. to 6 ft.
Solomon's Seal (_Polygonatum Multiflorum_).--A graceful hardy plant
bearing white pendulent flowers on long curving stems. Plant freely
in light, rich soil, in a shady position or under trees. The plants
should not be disturbed, even by digging among the roots. Flowers in
May. Height, 2 ft.
Soot-Water.--For room and window plants soot-water has this advantage
over coarse animal manures, that while the latter are unhealthy and
apt to taint the air, the former is purifying and has no unpleasant
smell. It is easily made by tying a little soot in a coarse canvas bag
and immersing it in a pail of water. It should be applied in a clear,
thin state to plants in bud or in full growth during the summer
months.
Sorrel.--Sow in March or April in any garden soil, thin out to 1 ft.
apart. It is desirable to cut away the flower-stems and to divide the
roots every two or three years. The plants may be forced for winter
use.
Southernwood (_Artemisia Arborea_).--Any soil suits this odoriferous
bush, and it is readily increased by cuttings or by division.
Sparaxis.--Closely allied to the Ixias, equally beautiful and varied
in colour, but rather dwarfer and compact in growth. Invaluable for
pot-culture. For outdoor cultivation plant them early in September,
5 or 6 in. deep, on a sheltered border, in rich, well-drained, loamy
soil. Protect from frost and wet in the winter, but keep the roots
moist while they are growing. For indoor cultivation plant four to six
bulbs in a 5-in. pot, plunge in ashes in a cold frame, withholding
water till the plants appear. When making full growth remove them to
a sunny window or conservatory, and water them carefully. They will
bloom in March or April. Height, 3 ft.
Sparmannia Africana.--An exceedingly handsome and attractive
greenhouse evergreen shrub, thriving best in loam and peat. Cuttings
may be struck in sand under glass. May is its flowering season.
Height, 10 ft.
Spartium Junceum(_Yellow Broom_).--A hardy evergreen shrub which will
grow in any soil, and is propagated by seeds. It flowers in August.
Height, 6 ft.