A host of enemies attack Cinerarias; indeed, there is scarcely a pest known to the greenhouse but finds a congenial home upon this plant. Mildew is more common in some seasons than in others. As a rule, it appears during July and August, especially after insufficient ventilation, or when the plants have been left too long in one place or too near to each other. Obviously weakness invites attack, and the necessity of robust and vigorous growth is thus effectually taught. On the first appearance of a curled leaf, dust the foliage and soil with sulphur, and give no water overhead until a cure has been effected. The aphis is easily killed by fumigation carried out on a quiet evening. Some gardeners prefer to give an hour or two once a week to the removal of the pest by means of a soft brush. From three to four dozen plants are easily cleansed by hand in the time named.
Star Cinerarias (C. stellata) are grown under precisely the same conditions as the Florists’ or Show Cinerarias, and this type of flower is highly valued for its singular gracefulness and beautiful decorative effect. In the conservatory and on the table it is an indispensable plant. The sprays admit of most charming arrangements in vases with any kind of ornamental foliage, and maintain their beauty for a long time in water.
Intermediate Cinerarias.—These new types of Cineraria, which in habit are intermediate between the Large-flowered and Stellata classes, make admirable subjects for table decoration, as well as for the adornment of the conservatory or greenhouse. In this class the Feltham Beauty strain undoubtedly has a great future before it. Originated at the Feltham Nurseries, this strain has attracted considerable attention at the numerous horticultural meetings where it has been exhibited, and since it passed into our hands a few years ago some very beautiful colours not to be found among the ordinary Stellata varieties have been added to it. The distinctive feature of the flowers is the white centre, which greatly enhances the vividness of the colouring of the petals. For the Intermediate section the same methods of culture as advised for the other classes of Cineraria will apply.
CLARKIA
C. elegans. C. pulchella. Hardy annuals
The two distinct classes of Clarkia named above include several varieties that have long been freely grown in gardens as summer annuals. But the very beautiful recent introductions in the Elegans class have lifted these flowers to a higher plane of usefulness for producing brilliant sheets of colour in beds, borders, shrubberies, and beside carriage drives. Although all the Clarkias bloom profusely in ordinary garden soil they well repay liberal treatment. Seed may be sown from March to May, or in September if an early display is wanted. In good ground each plant of the Pulchella varieties should be allowed a space of eight or ten inches, but rather more room must be given to the Elegans class to do the plants justice.
The Elegans varieties are of special value when treated as pot plants for conservatory decoration in May and June. From seed sown in August or early in September the plants can be slowly grown into magnificent specimens four feet high and almost as much in diameter. Our own practice is to sow thinly in clean well-drained 48-size pots. These are placed in a temperature of from 50° to 55°, and when the seedlings are large enough to handle they are pricked off into shallow boxes about three inches apart, the base of the boxes being freely perforated to insure ample drainage. The most suitable soil is composed of equal parts of sound loam and leaf-mould, with the addition of a gallon of coarse sand to each bushel of the mixed soil. After the plants are well established, ventilate freely to secure robust growth. When three inches high pinch out the points, and a little later transfer separately to small pots, keeping them close for a few days and as near the glass as possible. As the roots develop, transfer again to larger pots, and then the second and final stopping of the shoots must be done. Should very large plants be wanted they can be flowered in 16-size pots, using a compost slightly heavier than that advised at a younger stage of growth. The night temperature during winter should be about 45º, giving air freely by day whenever possible to do so with safety. As the branches need support, sticks of a suitable length must be provided, and the stems tied out in good time to prevent them from breaking off.
CLERODENDRON FALLAX
Stove shrub
A very handsome erect shrub, which is extensively grown in tropical gardens. In this country it attains a height of about two feet, and is easily raised from seed in a warm greenhouse or conservatory, where it proves to be a really beautiful and striking plant.