==Balsam==.--Towards the middle of the month a final sowing may be made with safety in the open ground. Former seedlings will need potting on until they reach the eight-inch size, and at each transfer put the plants in rather deeper than before; this encourages the growth of roots from the stems. While increasing the pot-room not a bud will show; but immediately the roots are checked by the pots, flowering will commence.

The old method of stopping and disbudding not only spoiled the plants, but robbed them of the finest flowers, which are invariably produced on the main stem. Since the natural method of growing Balsams has been in favour it is usual to see grand specimens covered with immense flowers.

==Campanula==.--The hardy perennial varieties may be sown in the open during the present month to provide seedlings for transplanting to flowering positions in autumn. Should there be any good reason for delay it will not be too late to sow in June or July, but the finest specimens are generally produced from May sowings. The best results can always be obtained by raising the required number annually and discarding the plants after they have flowered in the following season.

==Cineraria.==--Those who care to have Cinerarias in bloom during November and December may do so from a sowing made at the beginning of April, but it is not usual to start so early. Our own practice is to sow twice, during the present month and again in June, to insure a succession. From this month's sowings we look for our finest plants. The Cineraria is easy to raise and to grow, but it will by no means take care of itself.

It has so many enemies that unusual vigilance is necessary to flower it to perfection. It thrives in a compost of turfy loam, with a little leaf-mould added; but the soil should not be over-rich, or there will be much foliage and few flowers. Still, as the plant is a rapid grower, it must not be starved, neither must it suffer for lack of water. Pots or pans may be employed for the seed; and as the young plants grow freely, they may go straight to thumb pots without the usual intermediate stage of p.r.i.c.king off.

==Coleus== should be finally shifted into 48-sized pots. If signs of decline become manifest, weak liquid manure water given occasionally will revive the plants and intensify their colours. During the summer any ordinary greenhouse or conservatory will suit them, provided they are shaded from fierce sunshine.

==Cyclamen.==--The strongest seedlings should now be ready for 60-sized pots. Abundant but judicious ventilation, plenty of water, and freedom from aphis, are the conditions to be secured.

==Dahlia.==--Make the ground on which this flower is to be planted thoroughly rich. It is a rapid grower, and cannot attain to fine proportions on a poor soil. If the plants are carefully prepared for the change by free exposure on genial days, and also during warm nights, they will scarcely feel the removal. When first put out, dress the surrounding soil with soot to prevent injury by slugs, which show a decided partiality for newly planted Dahlias. Give water freely when requisite, and in staking the plants take care that the ties do not cut the branches. These ties will require attention occasionally during the summer and autumn.

==Delphinium.==--Sow the perennial varieties on a prepared bed. Thin early, without removing all the weaker seedlings, and when sufficiently advanced to bear removal, transfer to borders where the plants are to flower.

==Hollyhocks== may be put into the borders when the weather is quite warm. Wait until the end of the month, or even the beginning of June, rather than have them nipped by an untimely frost. Like the Dahlia this plant must have unstinted supplies of water and abundance of manure. A tall stake, firmly fixed, will also be necessary for each plant.

==Nicotiana.==--Seed may be sown on an open, sunny border, but it is a waste of seed and labour to put it into poor soil. Prepare the ground beforehand by deep digging, and by incorporating plenty of manure. If the near presence of other plants renders this impossible, drive a bar into the soil and work a good-sized hole. Fill it with rich stuff to within a few inches of the surface, and finish with fine soil, on which sow the seed. This method can only be adopted for light land. In the event of a cutting east wind after the seedlings are up, improvise some kind of shelter until the danger is past.

==Petunias== are very sensitive under a frost or cold wind. Therefore be in no hurry to bed the plants until quite the end of the month or beginning of June, especially if the weather appears to be at all threatening. A good mellow soil, free of recent manure, suits them. If unduly rich, it will strengthen the foliage at the expense of the flowers, and will also postpone the blooming until late in the season.

==Portulaca.==--It is useless to sow until the temperature is summerlike.

If necessary, wait until the close of the month, or longer, before putting in the seed. This flower will endure neither a moist atmosphere nor a retentive soil. Sow on raised beds of light soil, the more sandy the better; and in seasons which speedily burn the life out of other plants, Portulacas will display their beauty, no matter how fiercely the sun may beat upon them. Water will occasionally be necessary, but it should never be given until there is obvious need for it. Portulacas are easily grown in pots or window-boxes, and they will bloom profusely where many other flowers only wither and die.

==Primula.==--Almost every season witnesses the advent of some novelty in this flower, either in colour or in form. And the plant is now worth growing for the beauty and diversity of its foliage alone. The flowers range from pure white through all shades of tender rose up to a deep, rich crimson. After years of earnest effort, two beautiful blue flowers have been obtained. There are also several elegant double strains, and these possess a special value for bouquets, because of their enduring quality. All the varieties, including the popular Star Primulas, can be grown with ease in any soil which is fairly rich and friable. Equal parts of leaf-mould and loam, with a little sand, will suit them to perfection. Fill the pots firmly, taking precautions to insure effective drainage. A thin layer of silver sand sifted over the soil will aid an even sowing by showing up the seed. As a finish, shake over just enough fine soil to hide the sand. Thin sowing is important, because the most reliable new seed is almost certain to germinate at intervals, and the plants which come first can then be lifted without imperilling the remainder. p.r.i.c.k off as fast as ready round the edges of small pots, and shade until established. Then give air more and more freely.

==Stock, Ten-week.==--The preparation of the soil is the first business, and whether the Stocks are intended to be grown in small groups or alone in beds, the treatment should be the same in either case. With light land there is no difficulty; it is only needful to dig it well, and to incorporate a sufficient quant.i.ty of decayed manure. If disposed to incur a little extra trouble to give the plants a start, take out some soil with a trowel, and fill the hole with compost from the potting shed. This course is indispensable on heavy land; and a.s.suming it to be rich enough, the quickest and most effectual way is to make drills six inches deep at the proper distances, and nearly fill them with prepared soil, in which the Stocks can be planted. For a short time afterwards provide shelter from the midday sun, but do not keep them covered a moment longer than is necessary. In planting it must not be forgotten that an uncertain proportion of single specimens will have to come out.

On this account it is advisable to put them in small groups, and remove the surplus even if they are double,

==Sweet William==.--The introduction of several new varieties has created a fresh interest in this fine old garden favourite. This is one of the hardy biennials that will not be hustled. On a nicely prepared bed in the open sow thinly in drills either during this month or up to July. In due time transplant in rows, affording sufficient s.p.a.ce for each specimen to become stocky, and in autumn transfer to flowering quarters.

==Verbena==.--Beds for Verbenas should be rich, mellow, and very sweet. A poor soil not only produces poor flowers, but it materially shortens the blooming period. Peg the plants down from the outset, and allow them to cross and recross each other until there is a sheet of glowing colour.

==Wallflower.==--This fragrant spring flower is not always grown as well as it might be. It is often sown too late to become established before winter sets in. Sow now in drills nine inches apart on friable loam.

Thin to three inches apart, and transplant the thinnings. A little later repeat the operation, so as to leave the plants at a distance of six inches in the rows. a.s.sist them with water if necessary.

==Zinnia.==--A sowing in the open ground about the middle of the month will provide plants in gardens where there are no means of raising them artificially at an earlier date. Even those who possess a stock will be wise to put a final sowing in the open. If possible, choose a sunny border sloping to the south, and make the soil rich, fine, and rather firm. Drop seeds in little groups of three or four at each spot, allowing fifteen or eighteen inches between the groups. Cover lightly, and eventually thin the plants to one at each station.

==JUNE==

The days are now at their longest, and plants in pits and houses should have the full benefit of it. By opening the lights early, and shading in good time, the flowering period will be greatly prolonged. Ply the syringe over plants infested with aphis until they are quite clean. In some instances, it may even be wise to pinch off young shoots which are covered with the fly.

Keep Verbenas, Petunias, and the taller varieties of Phlox Drummondii pegged down; this furnishes the beds and helps to check evaporation.

Rain and watering alike tend to harden the ground; and as this condition does not favour growth, the surface should be frequently broken with the hoe.

==Anemone.==--Those who grow this flower from seed should make another sowing now or in July, even if they have thrifty plants from the February sowing. By this arrangement the flowering period is prolonged, and the finer blossoms will probably come from this month's sowing.

==Aquilegia== seed will germinate now in the open ground, and the plants need no protection during winter.

==Balsam.==--As a rule, it is unwise to put Balsams into beds or borders before the first week of this month. The plant revels in warmth and light, and should have an open, sunny position. Its succulent nature will indicate the necessity of giving abundant supplies of water. For so fleshy and apparently fragile a plant, it is astonishing how well it stands in a strong wind. From good strains the separate colours come so true that the design of a bed can be accurately arranged. As pot plants Balsams need no support, provided they are kept dwarf and stout, and they make admirable decorative subjects. But for indoor use it is easy to grow them in the open ground, and when well advanced they can be lifted with care and potted. This procedure offers the advantages of a choice of colours even from mixed seed and a selection of the most robust plants.

==Begonia, Tuberous-rooted.==--This has proved to be one of the most elegant and refined bedding subjects we possess, and it appears to become more popular every year. The plant is also freely grown in the reserve border to produce flowers for cutting. Employ specimens that are large enough to make a show at once, and select plants of the short-jointed cla.s.s for outdoor work. They must have unusually rich soil.

==Calceolaria.==--For wealth of bloom, combined with richness and intensity of colouring, the Herbaceous Calceolaria has no rival among biennials. A large greenhouse filled with fine specimens in their full splendour is a sight which will not soon be forgotten. One great source of interest lies in the annual changes in shades of colour, and the variations in the markings of individual flowers. From a first-cla.s.s strain of seed, high expectation will not be disappointed. Indeed, the excellence of seedlings is so fully recognised, that there is not the smallest advantage in propagating the plant by the tedious method of cuttings. But Calceolarias will not be trifled with. They must have an even temperature and unremitting attention to maintain a thriving condition. Fill the seed-pans or pots firmly with a compost which is both rich and porous; the last point is of great consequence in helping to secure free drainage. Make the surface perfectly even, and whiten it with silver sand; this answers the double purpose of revealing the seed and afterwards of showing when it is sufficiently dusted over with fine soil. Whether or not this method be adopted, the sowing must be thin and even, and as the seed is exceedingly fine, the task is rather a delicate one. Sheets of gla.s.s placed over the pans and turned daily will check rapid evaporation. Place the pans in a moist, shady spot, where the temperature is constant, and germination will take place in from seven to nine days, when the gla.s.s must be promptly removed. Then comes a critical stage, and a little neglect may result in the loss of past labour, and necessitate a fresh start. Still keep the pans in some sheltered corner which can be thoroughly shaded from the sun. This question of shade needs much vigilance. So also does the supply of water, which must not be administered wholesale, but rather by frequent gentle sprinklings. On the appearance of the second leaf, promptly p.r.i.c.k off the seedlings in carefully prepared pots, allowing about two inches between them. They will need dexterous manipulation because of their small size, but a skilful hand will transfer them without injury, and perhaps with a little soil adhering to the roots. As all the seedlings will not be ready at one time, it will probably require about three operations to clear the seed-pans, and the early removals should be so made as to avoid injuring the remainder. A pen, with the point firmly pressed into the holder, makes a small handy implement for the task.

Retain the seedlings in a sheltered position, and continue the attention as to shade and watering. In about a month the plants will be ready for thumb pots.

==Canna.==--In the mixed border, and also in the sub-tropical garden, Cannas are much valued for the exceeding grace and beauty of their foliage. They should be put into very rich soil; and, like all other plants of rapid growth, they will need copious supplies of water in dry weather. In mild districts and on dry soils the plants may remain out all the winter, under the protection of a heap of ashes. But, as a rule, it will be necessary to store them in frames until spring; and they may be finer in the second than in the first season.

==Cineraria.==--To insure a succession, and where a sufficient stock is not already provided, another sowing should be made, following the method advised last month. The seedlings, when transferred to small pots, should be put into a close frame, and be sprinkled with water morning and evening until the roots take hold. At first it is desirable to keep them fairly warm, but in a fortnight the heat may be gradually reduced and more air be given until cool treatment is reached. The plants will need potting on up to November, when they should go into the final size; and, except for special purposes, 6-1/4-or 7-1/2-inch pots are large enough. Cinerarias are sought after by every pest which infests the greenhouse. We need only say that by fumigation, sulphur, or by syringing with a suitable insecticide, the plants must be kept clean, or they cannot be healthy.

==Daisy, Double.==--The finest blooms are obtained from seedlings raised annually, and the general practice is to sow in the open ground during this month or July. When large enough transplant to good ground for blooming in the following season. The new Giant forms of the Double Daisy are of superb size, closely resembling finely shaped Asters in form.

==Dianthus.==--For a display next summer, sow in drills drawn six inches apart in an open situation, and cover the seed lightly with fine soil.

Shade the spot until the plants show.

==Geranium.==--Sometimes a difficulty is experienced in bringing Geranium seedlings into flower. They possess so much initial vigour that the production of wood continues to the very end of the season. Plants which show signs of excessive growth should be put into the border without removing the pots. This check to the roots will throw the plants into luxuriant bloom.

==Gladioli== are very liable to injury by high wind, and stakes should be put to them in good time. Each plant may have a separate support, and this is the most perfect treatment; or the stakes may be at intervals, or at the ends of rows, connected by lengths of strong, soft material, to which intervening stems can be secured. The work should be done carefully, and if the flowers are intended for exhibition they must also be shaded by some means. This may be a cheap or a costly proceeding; but in whatever manner it is carried out, security is essential, or the whole bed may be ruined.

==Hollyhock.==--A sowing in the open ground will produce plants for wintering in the cold frame; and if generously treated, they will make a fine show in the following year.

==Myosotis.==--During this month sow Sutton's Pot Myosotis and bring forward in a cold frame for winter decoration, for which purpose this plant is rapidly increasing in favour. Seed of the hardy varieties may also be sown now or in July, choosing a shady spot in the open ground.

Transplant when large enough.

==Nicotiana.==--To expose Tobacco plants before warm weather is established will give them a check from which they may not recover until the summer is half over, if they recover at all. Spare frames with movable lights will prepare them admirably and save labour. The second week of this month is generally warm enough for the planting. The seedlings must have a very rich soil, and abundance of water in dry weather. A heavy mulch of decayed manure will supply them with food and check evaporation.

==Pansy.==--From the end of May to the end of July seedlings may be raised in the open ground. Thin and transplant when ready.

==Polyanthus== to be sown from May to July on a shaded border. Thin the seedlings boldly, and bed the thinnings. Those raised early will flower next spring, but the later seedlings cannot be depended on for blooming in the first year.

==Portulaca.==--The weather may have been too cold and wet for sowing in May, or seed then sown may have failed; happily, there is yet ample time for raising this flower, in either beds or pots.

==Primrose.==--This fine old favourite may be grown from seed in various tints of yellow and almost any shade of colour from white to deep crimson; an effective blue has also been achieved. Primroses make beautiful pot and border flowers. Seed may be sown from May to July.

Seed-pans can be used, or the sowing may be made in drills in the open.

In the latter case, a free dressing of soot must be employed to render the spot distasteful to slugs. When transplanting, give the plants a deep retentive loam if possible, and a shady position.

==Primula.==--To insure a succession of flowers next spring, make another sowing as advised under May. Seedlings which are ready should be got into small pots, and afterwards they must be re-potted when necessary; but never shift them until the pots are full of roots, and always put them in firmly up to the collar.

==Solanum.==--The berried varieties may be grown entirely in pots, or they can be put into beds for the summer, from which they will lift for potting again just as the handsome berries are turning colour. The spiny-leaved varieties are valuable for sub-tropical gardening. Small plants are of little worth, hence they should be put into very rich soil, with a thick layer of manure on the surface, and have copious supplies of water to induce free growth.

==Stock, Spring-flowering.==--This valuable section, which includes the popular Brompton strain, usually comes into bloom in May and June. Seed is sometimes sown where the plants are to flower, but a certain degree of risk attends this mode of procedure, and Spring-flowering Stocks are so valuable that they are worth more careful treatment. Either now or in July sow in pans, and place them under shelter until the plants are an inch high; then stand them in the open for a week before planting out.

==Stock, Winter-flowering.==--For their refreshing colours and delightful perfume Stocks are highly prized during the winter months. To have them in flower at Christmas, seed of Christmas Pink or Beauty of Nice should be sown in June. It is usual to grow three or more plants in a pot, according to size. At the fall of the year place them in the conservatory or a cool greenhouse, and give a.s.sistance in the form of weak liquid manure as soon as the buds appear. Other suitable varieties, of which there are a number, may be sown in July or August for flowering indoors through the winter and spring months.

==Wallflower.==--If no seed was sown in May the task ought not to be neglected this month.

==Zinnia.==--The first week of June is about the right time to bed Zinnias, and there are three facts to be borne in mind concerning them.