It is highly desirable to have all the scientific operations as much advanced in the beginning of this month as is practicable, that at all times immediate attention may be given to the destroying of weeds wherever they appear.

ANNUALS, HARDY AND TENDER.

By the first of the month finish sowing all hardy Annuals and Biennials; and about the middle of the month all those that are tropical. The weather being now warm, they will vegetate in a few days or weeks. Attend to thinning of those that are too thick, giving gentle waterings to such as are weak in dry weather. Those that have been protected in frames should be fully exposed therein night and day; take the first opportunity of damp cloudy days to have them transplanted into the borders or beds, after the 10th, lifting them out of the frame with as much earth as will adhere to their roots.

CARE OF HYACINTHS, TULIPS, &c.

For the treatment of these while in bloom, see last month. The best time to take them out of the ground is about five weeks after they are done flowering, or when the stem appears, what may be termed half decayed. The best method to dry them is to place the roots in rows, with bulb to bulb, the stems laying north and south, or east or west. Give the bulbs a very thin covering of earth, merely to exclude the sun, so that they may not dry too rapidly, being thereby liable to become soft. When they have thoroughly dried in this situation, which will be in eight or ten days in dry weather, (and if it rains cover them with boards,) take them to an airy dry loft or shade, clearing off the fibres or stems, and in a few weeks put them in close drawers, or cover them with sand perfectly dry, until the time of planting, for which see October.

It is not advisable to allow any of the bulbs of either Hyacinths or Tulips to seed, as it retards their ripening, and weakens the root, except where there are a few desired for new varieties. The small offsets must be carefully kept in dry sand, or immediately planted.

ANEMONES AND RANUNCULUS.

These while in bloom should be carefully shaded from the sun by hoops and thin canvass, or an erect temporary awning; and as soon as they are done flowering, they must be fully exposed, and the waterings given up.

DAHLIAS, TUBEROSES, AND AMARYLLIS,

That are not planted, should now be done. For full directions see last month. In many seasons, any time before the twelfth is quite soon enough; but nothing ought to be delayed when the season will permit it to be done. It is necessary to have them properly labeled.

AURICULAS, POLYANTHUS, AND PRIMROSES.

They will now be done flowering, but still must be carefully kept in a cool, shady situation, and all decayed leaves cut off as soon as they appear. Examine them carefully and frequently, in case slugs of any description be preying upon them. A dusting of hot lime will kill them, or they may be otherwise destroyed. Some have recommended to repot and slip those plants when done flowering, "or they will contract a destructive disease;" which disease is a loss of verdure, and is induced by too much heat and drought, and a few other causes from inattention; but if attended to as above until September, when they should be fresh potted, they will have time to be sufficiently established before winter, which is the most judicious time to take off slips, for two reasons, viz.—they do not need so much nursing through the most precarious season of the year (summer) for these plants, and they begin to grow, and will root afresh sooner.

DOUBLE WALL-FLOWERS.

As these are very seldom grown from seed, and are semi-biennials, art has to be used to preserve or renew them. About the end of this month take shoots of this year about three inches long, cutting them carefully off, and smoothing the cut end with a sharp knife; from this cut the lower leaves off about one inch and a half, and then put it in the ground; choose a very shady spot, mixing the soil with a little sand and earth of decayed leaves. Sprinkle them three times a day until they have taken root, which will be in a few weeks. Keep the cuttings about four inches apart.

GENERAL OBSERVATIONS.

We do not consider that it is essential every month to repeat the necessity of tying up plants, saving seeds when ripe, cutting down weeds, raking, &c. with many other similar observations. We have already been full on these subjects, and expect these to be remembered through the season. Particular care, however, is required to carnations, pinks, or any plants that have heavy heads and slender stems. If carnations are desired to flower strongly, cut off all the buds except three, leaving the uppermost and any other two of the largest. All climbing plants should have timely support, and tied securely every week while they are growing.