Chapter 40

Aster.—Only those who are closely acquainted with the modern development of this handsome flower can have any conception of its varied forms and colours. There are dwarf, medium, and tall varieties in almost endless diversity, and nearly all of them will be a credit to any garden if well grown. Too often, however, flowers are seen which are a mere caricature of what Asters may become in the hands of men who understand their requirements. To grow them to perfection the ground should be trenched in the previous autumn, where the soil is deep enough to justify the operation. If not, the digging must be deep, and plenty of decayed manure should be worked in. Leave the ground roughly exposed to the disintegrating effects of winter frosts; and in spring it should be lightly forked over once or twice to produce a friable condition, in which the roots will ramify freely and go down to the buried manure for stimulating food. If by such means stiff land can be made mellow, it will grow Asters of magnificent size and colour.

In sowing it is not wise to rely on a single effort. We advise at least two sowings; and three are better, even if only a few plants are wanted. This diminishes the risk of failure and prolongs the flowering season. Prepare a compost of leaf-mould and loam, mixed with sharp sand to insure drainage. Towards the end of the month sow in pots or in seed-pans on an even surface; and we lay stress on a thin sowing, to avoid the danger of the seedlings damping off. Barely cover the seed with finely sifted soil, and place sheets of glass on the pans or pots to check rapid evaporation. If water must be given, immerse the pots for a sufficient time, instead of using the water-can. A cool greenhouse, vinery, or a half-spent hotbed is a good position for the pans, and a range of temperature from 55° to 65° should be regarded as the outside limits of variation.

Auricula.—Seed may still be sown; indeed, April will not be too late. Partially submerging the pans when water is needed saves many seeds from being washed out and wasted.

Balsam.—- Although this flower comes from a tropical climate, it is not very tender; a gentle hot-bed is quite sufficient to bring up the seed. Two or three sowings are advisable to secure a succession of bloom, and for the first of them the middle of this month is the proper time. It is important that the soil for this plant should be light, rich, and very sweet. When the seedlings show their first rough leaves, lose no time in pricking them off, and they should afterwards be potted early enough to promote a dwarf habit.

Calceolaria.—- Plants from last year’s sowing will begin to move, and should be shifted into their final pots before the buds show. The eight-inch size ought to contain very fine specimens. The compost for them should be prepared with care several days before use. Put the plants in firmly, and place them in a light airy greenhouse. As soon as the pots are filled with roots an occasional dose of manure water will be beneficial until the flowers begin to show colour, when pure soft water alone will be required. Tie out the plants some time before the buds attain full size.

Clerodendron fallax.—A charming stove plant, producing large heads of bright scarlet flowers suitable for greenhouse decoration. From seed sown in March or April there should be a show of bloom in August or September following.

Coleus is strictly a stove perennial. But our short winter days do not maintain a rich colour, and it will in almost every instance give more satisfaction if treated as an annual, enjoying the beautiful and varied foliage during summer and autumn, and consigning the plants to the waste-heap as wintry days draw near. We do not advise the sowing of seed earlier than March, because a considerable amount of daylight is necessary to the development of rich tints and diversified markings in the foliage. The essentials for raising plants from seed are good drainage, a temperature which does not fall below 65°, the careful employment of water, and the early transfer of the seedlings. The green plants may be thrown away immediately they reveal their character, but those which show delicate tints in the small leaves will abundantly compensate for all the care bestowed upon them.

Dianthus.—Put the seedlings into single pots, and harden in readiness for transplanting to the open in May or June.

Dimorphotheca.—This valuable half-hardy annual, a native of South Africa, known also as the Star of the Veldt, may be flowered within six weeks from time of sowing. Plants may be raised by starting seed this month or in April, in pans of light soil given the protection of a frame. Transplant in May, in well-drained soil, choosing a warm sunny spot. In the open, seed may safely be sown in May or June. Plants potted on from the early sowing will make a most attractive show in the conservatory, or seed may be sown in pots and the seedlings thinned to three or four in each.

Gaillardia.—To secure a supply of plants for the open ground in May, seed of all the varieties may be sown during this month. Prick off early and keep them dwarf.

Geum.—From seed sown this month or in April, the popular double variety, Mrs. Bradshaw, may be brought into flower in the first year. The seedlings should be pricked off into boxes and gradually hardened for putting out in May or June.

Gladiolus.—This is one of the most stately and beautiful flowers grown in our gardens. Some of the varieties are strikingly brilliant; others are exceedingly delicate in tint and refined in their markings. The culture may be of the most primitive kind, or it may become one of the fine arts of horticulture. Simply put into the ground and left to fight their own battle, the corms sometimes produce splendid spikes of flower, although not so imposing as better culture might have made them. Under skilful care the flowers are magnificent in size and colour.

The main work of preparing the ground should be done in autumn. Now it is only necessary to give the soil two or three light forkings, and those not deep enough to bring the buried manure to the surface. This frequent stirring is beneficial in itself, and it promotes the destruction of the foes which prey upon Gladiolus roots. Small Potatoes, roughly hollowed out, or pieces of Carrot, may be used as traps for wireworm and other vermin. Planting is sometimes done at the end of this month, but as a rule it is better to wait until the beginning of April.

Gloxinia.—There is yet time to secure a brilliant summer display from seed. Bulbs which have been stored through the winter need attention. Where these flowers are wanted early, and there is plenty of room, a commencement will probably be made in February; but in the greater number of gardens March is soon enough. Assuming the bulbs to be sound, they should be potted in a mixture of loam, peat, and sand. Those which start first must be re-potted for a forward supply. While growing, manure water twice a week will help to produce fine flowers, intense in colour; but when the flowers open, the liquid manure must be abandoned, and pure soft water be given as often as necessary, for Gloxinias cannot endure drought. Shading is an important matter from the commencement, and particularly during the flowering period.

Hollyhock seedlings will be ready for putting into thumb pots. Directly they are established, begin to prepare them for planting out in May.

Impatiens.—Some growers find a little difficulty in raising this elegant flower from seed. Probably it arises from sowing too early. Where there is a command of sufficient heat no trouble should be experienced in March, and it is essential to sow very thinly for two reasons. Crowded seedlings are liable to damp off, particularly in dull, moist weather, and they are so fragile that it is well-nigh impossible to transfer them from the seed-pots until they are about an inch high.

Lavatera.—As the Mallows do not transplant well it is desirable to sow in the flowering positions. Good ground is necessary to insure fine specimens, and ample space must be allowed for the plants to develop. The seed may be sown from March to May.

Lobelia.—The perennial varieties make splendid border plants, and are easily grown from seed. Sow during February or March, in moderate heat, and in due time transfer to a deep rich loam. Their dark metallic foliage and brilliant flowers are most conspicuous, and admirably fit them for the back row of a ribbon border, or for groups in the mixed border.

Lupinus.—Seed of the annual varieties may be put in from March to May, and it is necessary to sow where required for flowering, as transplanting is not satisfactory. The perennial Lupines may also be flowered as annuals by sowing seed in March or April.

Marigold.—Both the African and French varieties are of importance late in the season, for they continue to bloom until cut down by frost. The former reaches the height of from eighteen to thirty inches, and the colour is limited to yellow in several shades, from pale lemon to deep orange. The latter is more varied in habit as well as in colour, and the Miniatures make excellent bedding plants. In hot dry seasons Marigolds entirely eclipse Calceolarias, because they can well endure drought and a short supply of food; whereas the Shrubby Calceolaria does not thrive under such conditions. All the varieties of Tagetes may be sown now on a moderate heat, and they should be pricked off into pans or boxes in readiness for transferring to the open ground in May.

Marvel of Peru.—The treatment prescribed for Balsam will suit this plant. In the first year it will grow to a considerable size, but will not, as a rule, attain to its full dimensions until the second season. It is a half-hardy perennial, and when saved through the winter will need protection from frost.

Mignonette finds a welcome in every English garden; and to add to its attractiveness there are now yellow, red, and white varieties, in addition to such forms as dwarf, pyramidal, and spiral. Mignonette can be grown without the least difficulty; indeed, it will reproduce itself from seed shed in the previous year. Nevertheless, it is true that in the majority of gardens justice is seldom done to this flower, for the simple reason that there is not sufficient faith in its capabilities. Each plant will cover a space of at least one foot, and we have seen specimens a yard across, bristling with flower-spikes which are delightfully fragrant. The soil for it should be made firm, just as an Onion bed is treated. Except for this one point, the culture of a hardy annual is all that is necessary. Mignonette does not transplant successfully, but otherwise it is very accommodating. The seedlings are frequently taken off by fly as fast as they appear above ground. Soot and wood-ashes applied in good time are the best preventives; but a second sowing may be necessary, and it should be made immediately the loss is discovered.

Nemesia.—For the earliest display of this beautiful annual the first sowing should be made in pots under glass during this month. In the open border seed may be sown in both May and June. Occasionally a little difficulty is experienced in raising plants under artificial conditions, but those who sow in beds or borders from the same packet of seed during the months named, will find that the culture is quite easy.

Pentstemon.—The treatment recommended for the perennial section of Lobelias will exactly suit this flower.

Phlox Drummondii.—There is still time to sow. Established seedlings should be gradually hardened by free access of air, until they are ready for the open ground.

Phlox, Perennial, may be raised from seed sown in shallow boxes in the early part of this month, and placed in moderate heat. Transplant the seedlings when ready, gradually harden, and plant out in rich soil one foot apart, or put them into vacant places in the shrubbery. Aid with water if necessary.

Poppy.—The annual varieties do not well bear transplanting, especially from light soils, and therefore, as a rule, it is advisable to sow where the plants are intended to bloom. They make conspicuous lines and clumps among shrubs; and this is especially the case with the huge flowers of the double class. Sow in March and April, and commence thinning the seedlings while they are small. They should ultimately be left about one foot apart. The perennial Poppies may also be flowered as annuals if sown in this month and transferred to open quarters when large enough.

Schizanthus.—Elegant half-hardy annuals, which can be grown as specimens for the conservatory, or in quantity for open borders. Sow in gentle heat, and pot on the seedlings.

Solanum.—For a succession of the varieties which are grown for their berries, sow again in heat, and make a sowing of the ornamental-foliaged kinds for sub-tropical gardening. The latter are rather more tender, and need a somewhat higher temperature than the former. They must all have liberal culture to bring out their fine qualities.

Statice.—The hardy annual varieties of Sea Lavender may be sown during March or April, and the best results are obtained by starting the seed in pans and planting out when the seedlings are far enough advanced in size. Seed of the hardy perennial kinds should be sown from April to July on light soil, and transplanted later on to flowering quarters.

Stock, Ten-week.—The increasing favour shown for Annual Stocks is in part no doubt attributable to the growing appreciation manifested for all kinds of flowers. But it is traceable in a still greater measure to the augmented purity, brilliance, and variety in colour of modern Ten-week Stocks, as well as to the enhanced reliability of seed in producing double flowers. We need say nothing of its perfume, for this is a quality which the most unobservant can scarcely fail to notice.

Although the Ten-week Stock is half-hardy, it must not receive the treatment of a tender annual; indeed, one of the most important points in growing it is to avoid any excess of artificial heat. A little assistance at the commencement it must have; but the aim should be to impart a hardy constitution from the moment the seedlings appear. We are not advocating reckless exposure to chill blasts, but the necessity of giving air freely whenever there may be a fair opportunity. The best of seed-beds can be made in pans or shallow boxes filled with sweet, sandy soil. In these sow thinly, so that the young plants may have abundant room. Even a little apparent wastefulness of space will be repaid by stout and vigorous growth. From the middle to the end of the month is a suitable time for sowing.

Sweet Pea.—This flower is so much in demand for decorative purposes that a prolonged display should be secured by successive sowings, commencing in this month and continuing until May, or even to June, where the soil and circumstances are specially favourable. The value of groups of Sweet Peas in borders and for enlivening shrubberies is now thoroughly appreciated, and it is not uncommon to see fine clumps among dwarf fruit trees.

Tigridia, or Ferraria.—Finer flowers are generally obtained from the open border than from pots, and the bulbs should be planted out three or four inches deep in March or April. Sandy loam and peat suit them admirably. On a dry border these bulbs will pass the winter safely, but in wet land it will be perilous to leave them out.

Verbena.—It is possible to raise Verbenas in the open from seed sown in drills on light soil, but the attempt is a little hazardous. There is, however, no danger at all in sowing in pans placed in a cool frame. The plants should be potted immediately they are large enough to handle. The flowering from this sowing will be rather late, but not too late for a good show of bloom.

Zinnia.—The double varieties are now grown almost to the exclusion of single flowers, and the former are so incomparably superior, that they are judged by the severe rules of the florist. With this plant it is useless to start too early. Towards the end of the month a commencement will be made by experienced growers, but the comparative novice will be wise to wait until the beginning of April. Sow in pots filled with a compost of leaf-mould, loam, and sand, and be quite sure there is effectual drainage. Plunge the pots in a temperature of about 60°.

APRIL

Many half-hardy flowers, such as Acroclinium, _Convolvulus major_, _Linum rubrum_, Nemesia, Salpiglossis, Schizanthus, and others, which at an earlier period can only be sown with safety under protection, may now be consigned to the open ground without the least misgiving. A knowledge of this fact is of immense value to owners of gardens that are destitute of glass, for it enables them to grow a large number of flowers which would otherwise be impracticable. Of course, the flowering will be a little later than from plants raised earlier in heat.

Annuals, Hardy, which were not sown in March should be got in during this month and in May. A large number of beautiful subjects are available for the purpose, the most popular of which are named on page 373.

Aster.—When the seedlings attain the third leaf, they should be pricked off round the edges of 60-sized pots; later on put them singly into small pots, from which the transfer to the open ground will not cause a perceptible check. As the plants do not thrive in a close atmosphere, it is important to give air freely on every suitable occasion, or they cannot be maintained in a healthy growing condition. A second sowing should be made about the middle of the month, following the routine already advised. A sowing in drills on a carefully prepared bed in the open ground is also desirable, and in some seasons it may produce the most valuable plants of the year. Asters come so true from seed that the bed may be arranged in any desired pattern. Thin the plants early, and continue the process until they are far enough apart for flowering. A distance of eight inches is sufficient for the miniatures, ten inches for the dwarfs, and twelve or fifteen inches for the tall varieties.

Balsam.—About the middle of this month will be the time for a second sowing, and the seed may be raised in a frame without artificial heat.

Canterbury Bell.—Sow in good soil from April to July and transplant when ready. Under generous treatment these hardy biennials make a beautiful display in borders and the pure colours show with striking effect against the dark foliage of shrubs.

Carnation.—Any time from now until August will be suitable for sowing, and if the seed has been saved from a first-class strain, a good proportion of very fine flowers will be produced in the following year. For these plants florists have always considered it important that the potting soil should be prepared months before use, and there are good reasons for the practice. If this is impossible, see that the compost is sweet, friable, and, above all, free from that terrible scourge of Carnations, the wireworm. Even sifting will not rid the soil of its presence with certainty, but by spreading thin layers of the mould evenly upon a hard, level floor, and passing a heavy roller over it east and west, then north and south, the wireworm will be disposed of. Or dressing the soil with Vaporite two or three weeks in advance of potting will often prove effectual. Turfy loam three parts, leaf-mould one part, decayed cow-manure one part, with an addition of sharp sand, make a first-class compost. Sow in well-drained 48-sized pots, cover the seed very lightly, and place in a frame. Transplant the seedlings immediately they can be handled, when a cool, shaded pit will keep them in hard condition. After six or eight leaves are formed it will be time to plant them out. In the following spring the usual routine of staking and tying must be followed.

Chrysanthemum leucanthemum (Marguerite, or Ox-eye Daisy).—Seed of these well-known perennial varieties may be sown any time from April to July. There are several greatly improved forms of this popular flower which may now be had in bloom from May until early autumn. Start the seedlings on a bed of light soil, and when large enough transplant them to positions for flowering in the following year.

Cyclamen.—The bulbs which have been flowering in pots through the winter are now approaching their period of rest, and they must not be neglected if they are to make a satisfactory display next season. Water should be gradually diminished until the foliage dies off, and then the corms will require shade, or they will crack. Dry treatment generally results in an attack of thrips, and each root must be painted with some good insecticide to destroy the pest. Cyclamen should never be allowed to become actually dust-dry; but if the pots can be plunged in a shaded moist pit, watering will rarely be necessary. In June the pots may be buried to the rim in a shady spot until August, when it will be time to re-pot and start the bulbs into growth. The chief enemies of Cyclamen are aphis and thrips. Fumigation will settle the former; for the latter, dip the plants in a solution of tobacco-water and soft soap.

Dahlia, seedlings must have plenty of water, and be kept free from aphis while in pots. Instead of taking out the leading shoot, as is often done, give it the support of a neat stick. The plants should also be potted on as growth demands, the important point being to maintain steady progress without a check until they can be planted out. At the same time they must be hardened in readiness for removal to the open ground; and if the work is carried on with judgment, the plants will be dwarf, and possess a robust constitution capable of producing a brilliant display of flowers until frost appears.

Gladiolus.—Assuming that the beds have been properly prepared, we have now only to consider the question of planting, and no better time can be chosen than the beginning of April. Some eminent growers are at the trouble of taking out the soil with a trowel for each bulb. In the opening, a bed of sand and wood-ashes or powdered charcoal is made, on which the root is placed. Others lay them in deep drills, partly filled with a similar light mixture. Whichever method is adopted, the crown of the corm should be left about four inches beneath the surface. The distance between them may vary from twelve to eighteen inches, and the greater space is a distinct advantage when attending to the plants subsequently. The same rules apply to the planting of clumps.

Kochia trichophylla.—Sow seed where the plants are to stand, or in a prepared bed from which they can be transferred to make clumps, lines, or single specimens where the attractive foliage will be most effective.

Lobelia.—Early in the month transfer the seedlings to pans or boxes, but the latter are preferable. Not a single flower should be allowed to show until the plants are established in the open ground. Although Lobelias are very attractive in pots, they cannot be satisfactorily grown in them, with the exception of the _ramosa_ varieties. But the object is easily attained by potting plants from a reserve bed after they have developed into good tufts. From a stiff soil they can be lifted and potted with facility; and a light soil will cause no difficulty if the bed be soaked a short time in advance. After potting, the plants will give no trouble, except to supply them with water.

Marigolds can be raised in a cold frame, and towards the end of the month there will be no risk in sowing in the open ground. The plants thrive in a sunny position, even in scorching seasons.

Marvel of Peru.—If not sown last month, there is no time to lose; and with a little care seed can now be germinated without artificial heat. When the plants come to be transferred to the open, put them, if possible, in sandy loam, exposed to full sunshine.