Some annuals, such as the mignonette and the larkspur, are much longer before they vegetate than others; and these are better sown in autumn. Others, such as the escholtzia, the coreopsis, and the Erýsimum Perowskiànum, will often last two or three years, especially if they happen to be late in flowering the first season. They also do best sown in autumn, but they must be protected, if the winter should be very severe, by laying a mat over the bed. You must observe, however, that the mat must only be resorted to in frosty weather, as, in case the weather should be at all damp, the plants will be much better exposed to it, however cold it may feel, than they would be under any protection whatever. The _half-hardy annuals_, such as the French and African marigolds, the German and China asters, the zinnias, the purple jacobæa, the sweet sultan, the purple and yellow everlastings, and other similar plants, should be sown in pots, and plunged into a slight hotbed in February or March. As soon as they come up, and have got their second pair of leaves, the earth should be turned out of the pot, and the seedlings being carefully picked out should be transplanted into other pots, three or five in each, according to the size they are expected to attain when full grown, and the pots again plunged into the hotbed. Sometimes they are transplanted a second time, but they are generally left till the beginning of May, when they are removed to the open border, to the places where they are intended to flower. When they are planted in the border, they may either be transplanted in the ordinary way, or the ball of earth may be turned entire from the pot into a hole made to receive it. This last plan is generally considered the best, as it prevents the plants from receiving any check by their removal. Brompton ten-week, and German stocks, though quite hardy, make better plants when treated like half-hardy annuals, as they flower earlier and much more vigorously.