ANNUALS.
Those that are tender and were sown last month, according to directions, will be ready to prick out into another light hot-bed, about two feet high, prepared as directed in February. Keep them a few inches apart to let the air circulate. Give them frequent sprinklings with water, and shade them with a mat for a few days until they have taken fresh root; then give them plenty of air, and by the first of next month expose them night and day to harden the plants for the open ground. A few of the annual seeds of every description, and of every country and climate, may be sown any time after the middle of the month. If the season prove favourable they will do well; but reserving a part to sow about the 15th of May, will guard against every extreme.
Those that have come above ground should be thinned out, the dwarf-growing kinds to two or three inches, and the large sorts to four or five inches apart; or they may be only separated about an inch, going over them again in a few weeks; when a few might be taken of those that will bear removing, and plant them in vacant spaces that require filling up. All the varieties of French and African Marygold answer best when transplanted, likewise the species of Coreòpsis that were sown in autumn. The varieties of Ten-week Stock, Balsams, Coxcombs, and other strong growing sorts, generally flower stronger when replanted.
BIENNIALS AND PERENNIALS.
Any biennials that are intended to be removed, and not done last month, must not be delayed longer. The roots of many of them will be very strong, and if possible a cloudy day should be chosen for the operation. Give copious waterings in the evenings until they begin to grow. When the sun is strong, they must be shaded by a piece of board, shingle, or any similar substitute, for some days. When the seeds of these are sown, they should be distinctly marked. The initial B. is the most appropriate.
Perennials. For a limited description of several genera and species, see last month. Those that have not been divided and replanted, where large, they should be done directly, if the weather is dry. They must be carefully watered, and shaded as above directed for Biennials.
DAHLIAS.
Dáhlia supérflua, or what is now called Georgìana variábilis, is one of the most fashionable and popular hardy herbaceous plants of the present day. The varieties of the present species are almost endless. The double kinds only are cultivated, the single varieties having been thrown aside. Several collections in Europe contain upwards of three hundred double varieties, of every colour and taste, occupying more than two acres of ground. It will be difficult to specify the finest; but in this country the dwarf-growing sorts are preferred. To make them flower freely, they should be planted in poor heavy soil. From the end of this month to the middle of May, take the roots from their winter quarters to the garden, and with a spade make a hole sufficiently wide and deep to receive the crowns of the roots one inch deeper than the surface of the ground, cutting off with a sharp knife the old stumps close to the eyes. They have the finest effect in rows; plant them four feet apart in the row, and the rows six feet asunder. Individual plants of a dwarf nature look extremely well. The best one for this is the Dwarf Globe Crimson, and is perhaps the finest that is known, being prolific, compact, beautiful, and very dwarf, never exceeding three feet: if properly grown, Púlla elècta, Famæa, and Zenò, are also fine dwarf sorts; as tall growing kinds Etna; Imperiòsa; Ciceró; Cocàde; Cambridge Surprise; Dutchess of Wellington; Countess of Liverpool; Barret's William Fourth; True Mountain of Snow; Diàna; Crimson Bonnet; and Exímia, are all superb, and at present the highest in estimation. For the names of more of the finest varieties, with their colour, see Catalogue at the end of the work.