The following list contains the varieties which are best adapted for the purpose:—
Alyssum, Sweet
Antirrhinum
Asperula azurea setosa
Calandrinia umbellata
Calendula officinalis fl. pl.
Candytuft
Cheiranthus Allionii
Chrysanthemum, Morning Star
Chrysanthemum, Evening Star
Chrysanthemum inodorum plenissimum
Chrysanthemum segetum gr.
Clarkia
Collinsia
Coreopsis
Cornflower
Erysimum
Eschscholtzia
Gilia tricolor
Godetia
Iceland Poppy
Larkspur, dwarf rocket
Leptosiphon
Limnanthes Douglasii
Linaria, pink
Nemophila
Nigella, Miss Jekyll
Papaver glaucum
Phacelia tanacetifolia
Poppy, Shirley
Saponaria calabrica
Scabious
Silene
Sweet Sultan
Venus’ Looking-glass, purple
Virginian Stock
Viscaria
Whitlavia
Sow thinly, not later than the middle of the month in cold districts, but September will be early enough in the Southern counties. Drills are preferable to broadcasting, because the beds are more easily weeded and kept in order. Thin the rows early, so that the plants may become stout and hard before winter overtakes them. Early in the new year transplanting must be resorted to during open weather if the plants are to be flowered in heavy soil; but on light, rich land, sow where they are intended to bloom.
Annuals under Glass.—The flowers available for winter and spring blooming are naturally few in number compared with those which fill gardens and conservatories during the summer months. But it is not generally realised that several favourite outdoor annuals are as serviceable for flowering under glass in the short days of the year as they are for growing in the open ground in summer, and they are the more valuable for winter and spring use as no elaborate system of cultivation is needed. Any greenhouse or conservatory from which frost can be excluded will grow these annuals well. Seed should be sown in August or September, in pots or pans placed in a cool house or frame. When the seedlings have made some progress, prick them off into the pots in which they are wanted to flower, and grow steadily on, bearing in mind always that the most important point is to keep the plants as hardy as possible by giving air at every favourable opportunity. The following varieties are especially suitable for winter and spring flowering under glass:—Alonsoa; The Star and Dunnettii varieties of Annual Chrysanthemum; Clarkia elegans; Dimorphotheca; Gypsophila elegans; Linaria; Nemesia Suttoni; Nicotiana, Miniature White and N. affinis; Phlox, Purity; Salpiglossis; and Swan River Daisy.
Asters for indoor decoration should now be lifted from beds or borders and potted. It is worth a little trouble to accomplish the task with the least possible injury or disturbance to the roots. Light soils should have a good soaking of water on the previous evening, to prevent the mould from crumbling away.
Carnation.—Seed may still be sown as advised in April; but to carry the plants safely through the winter it is necessary to have them strong before cold weather sets in.
Chionodoxa can be forced with the same ease as Roman Hyacinths. A 48-sized pot will accommodate several bulbs.
Cinerarias are frequently placed in the open during this month and September, and as it tends to impart a hardy constitution, the practice is to be commended. A north border under a wall will suit them, but the proximity of a hedge should be avoided. Before the plants are put out see that they are quite clean, or it may be necessary to restore them to the house in order to rid them of some troublesome pest.
Clarkia.—The varieties of the Elegans class make very handsome pot plants, and to insure the requisite number seed must be sown in well-drained pots during this month or early in September.
Cyclamen.—Where Cyclamens are extensively grown it is usual to make the first sowing in August, and many gardeners regard this as the most important period for securing healthy young seedlings. A common mistake with beginners is to raise them in too high a temperature. On this and other points useful suggestions will be found in the article commencing on page 256.