To make Hyacinths flower early in December, they should be planted the beginning of August, and the pot plunged, in the open air, to such a depth that they may be covered with mould to the extent of four inches. They should be taken out again about the middle or end of October, put in warm tan or sand in a hothouse, near the sashes, and kept moist If treated in this manner, and kept moist and warm, they will not fail to flower about the beginning or middle of December. Many other sorts may be brought into flower about the beginning of January. Those forced Hyacinths which are intended to flower in February and March should be planted in September and October, or even about the middle of November, the pots being plunged in the open air, and covered with mould. A bed should be made at the beginning of January, consisting of horse dung, four or five feet deep; it should remain in that state about a week, and then as much mould added as will cover the pots when they are sunk in it. The pots should be now all put in, and the sash raised four or five inches to admit air both night and day, so that the steam generated by the heat may readily escape. This must not be neglected, even during frosty weather, otherwise they will perish.

During a severe frost it may be thought that admitting the air is quite unnecessary, but it should not be omitted, only hanging cloths over the opening.