Cyanthus Lobatus--A small, but very beautiful procumbent perennial,
well adapted to fill moist places on rock-work if the situation is
open and sunny. A mixture of vegetable mould and sand suits it, and it
is best increased by cuttings placed in moist peat. It flowers in the
autumn, the flower-stems being from 6 in. to 1 ft. in length.
Cyanus(_Cornflower_).--Very pretty and free-blooming hardy annuals.
Sow the seed in the open in autumn for an early display of flowers,
or in March for a later one. Thin out to 2 ft. apart. Bloom in July.
Height, 2 ft. to 3 ft.
Cyclamen.--Charming winter and spring blooming bulbous greenhouse
plants, which thrive in a mixture of sandy loam and vegetable mould.
They require a moist atmosphere and a uniform temperature not lower
than 50 degrees. They may be increased by seed sown in slight heat as
soon as it is ripe. Plant the bulbs in October, also in February and
March, placing them so that the crown is level with the top of the
pots. One full-sized bulb is sufficient for a 6-in. pot, which must be
provided with good drainage and placed on a layer of coal ashes that
is kept constantly moist. Water moderately till growth begins, then
increase the supply. Give a little liquid manure, in a weak state, if
a large quantity of flower-buds appear. When the blooming season is
over, plunge the pots in a shady, well-drained border, and when the
leaves start afresh turn the plants carefully out of the pots, so
as not to injure their roots, and re-pot in fresh soil. C. Persicum
flowers in February, and C. Neapolitanum in April. C. Europeum is a
hard variety, thriving in any situation. It produces sweetly-scented
flowers throughout July and August. It does best when planted under
trees, or in partial shade on rock-work, in well-drained, good loamy
or peaty soil mixed with a fair proportion of brick rubble. Plant the
corms in September 3 in. apart, and 1-1/2 in. deep. Height, 6 in. to 9
in.
Cydonia (_Pyrus_).--These hardy plants are well adapted for
trellis-work, but are more effective when grown as bushes, and flower
more freely than when trained to the wall, the bloom often lasting to
the winter. They will grow in any soil, and are increased by suckers.
Height, 4 ft. and upwards.
Cyperius Alternifolius.--A stove grass which will grow in any soil,
but requires a plentiful supply of water. It is increased by dividing
the roots. Height, 2 ft.
Cypress (_Cupressus_).--Among these useful conifers C. Lawsoniana has
no superior as a single specimen for the decoration of the lawn. Of
free growth and perfectly hardy, it succeeds in almost any soil or
situation. C. Fraserii is also hardy, of erect habit, and of a rich
glaucous hue. When it attains a good size it is very ornamental. The
beautiful silver variegated variety Argenteo Variegata deserves a
place in every shrubbery. Nana Alba Maculata is a dwarf globular
plant, the slender branches of which are tipped with white, giving it
the appearance of being partly covered with snow. Pygmea is a compact
dwarf-growing variety suitable for the centre of small beds and for
rock-work. Japan Cypresses are elegant little shrubs, one of the
finest being Retinospora Ericoides, whose peculiar violet-red leaves
contrast charmingly with light green plants. Any of the above may be
increased by cuttings. They succeed best in a rich, deep loam, and are
improved by thinning out the branches where too thick, and pinching
out the stronger shoots where too thin, so as to encourage new growth.
Cypripedium (_Hardy Ladies' Slipper Orchid_).--This plant is of
the simplest culture and is well adapted for pots, ferneries, or
rock-work. It is most at home in a well-drained yet moist peaty soil,
and kept in a frame or on a shady border, where it will bloom in June.
Protect from frost and heavy rains, but never allow the roots to get
dry. Height, 1 ft.
Cytisus.--Elegant hardy shrubs with finely-cut leaves and terminal
racemes of Pea-shaped flowers in July. They will grow in any soil, and
are readily raised from seed or layers. Height, 3 ft. to 4 ft.
D
Daffodils.--These will grow in any good, cool, moist, well-drained
garden soil if sand be put round their roots, but thrive best in a
moderately rich loam. They may remain in the ground for years, for
large bulbs produce the finest flowers. When the flowering is over the
leaves must be allowed to die down, not cut off. Plant from September
to December. The top of the bulb should be about 3 in. below the
surface, according to its size; 10 in. apart is a good distance.
Daffodils are also suitable for pot culture. Plant three to six bulbs,
according to size, in a 4-in. or 5-in. pot, using a compost of two
parts fibrous loam, one part leaf-mould, and one part sand. Place the
pots on a bed of ashes, and cover with 4 in. of cocoa-nut fibre. As
soon as top growth has commenced, remove the plants indoors, and
give plenty of light and air to prevent them being drawn. Daffodils
likewise make a good display when planted on a lawn.
Dahlias.--These attractive plants require a deep, friable soil, not
over rich. They may be grown from seed sown on a hotbed in March and
lightly covered with fine mould. As soon as they are up give all the
air which can with safety be given. When the seedlings are large
enough pot them off singly in the smallest-sized pots or round the
edges of 6-in. ones. Plant them out at the end of May, 1 ft. apart;
they will flower at the end of August. Any that turn out very good had
better be propagated by cuttings from the young tops, to save the kind
in case the roots should die. When flowering is over take up the young
bulbs and treat them as directed afterwards for old tubers.
Another way to propagate them is to place the old tubers in soil over
a hotbed early in March. When the shoots are a couple of inches high
the tubers may be taken up and divided with a sharp knife. Pot off
separately. Water them occasionally with liquid manure, made from
guano and powdered charcoal, well mixed with rain water, and plant
them out early in May. Give them plenty of room, and tie the branches
securely to stakes firmly fixed in the soil. When they have become
good bushy plants put a layer of half-rotted manure round each plant.
As soon as frost turns their foliage brown take them up, cut off the
roots, leaving about 6 in. of stem attached, and plunge them into a
box of sand, chaff, or ashes, and preserve them from damp, frost, and
heat during the winter.
Daisies (_Bellis Perennis_).--These pretty, little hardy perennials
are very useful as edgings. To grow them to perfection the ground
should be highly manured, and the roots divided every year, planting
them out 6 in. apart in a cool, shady situation. October is a suitable
time for transplanting. They flower continuously from February to
July. Height, 6 in.
Dandelions.--Dandelions on lawns, etc., may be killed by cutting them
down as low as possible, and putting a little gas-tar or a pinch of
salt on the wound. Or they may be dug up and blanched for mixing with
salad. In this case plant six roots in an 8-in. pot, and place an
inverted flower-pot over the whole, in order to exclude the light; the
plants are sometimes blanched in the open by covering them with old
tan or fine ashes. The flowers must be kept picked off, for they soon
run to seed, and if unattended to become troublesome.
Daphne.--Beautiful shrubs, mostly evergreens, bearing elegant flowers
followed by bright-red poisonous berries. D. Mezereum is the most
common variety, and is very suitable for the front of shrubberies. The
Chinese variety D. Odorata is too tender for outdoors, but makes a
fine ornament for the greenhouse. The dwarf kinds, bearing fragrant
pink flowers, are rather tender, but are very useful for rockeries
occupying sheltered positions. They all need a peaty soil, and may
be increased by grafting on to the common Spurge Laurel. Different
varieties flower at various periods, from February to October. Height,
9 in. to 6 ft, but the majority are from 2 ft. to 3 ft. high.
Datura.--Ornamental half-hardy annuals. The seeds of all the species
must be sown on a hotbed early in spring. When the plants are strong
enough transplant them in the border, where they will bloom more
freely than in pots. The seeds of D. Ceratocaula will sometimes remain
several years in the ground before they germinate. They flower in
July. Height, 2 ft. to 3 ft.