Take notice of varieties that have done well with you, as well as individual plants that have produced the best flowers. Of some varieties you may only need a few, as they send up large quantities of thrifty cuttings. Other as equally good varieties propagate slowly, making few cuttings. These latter you must save more plants of. Lift your required number of plants and plant in four or five inches of soil in flats or boxes. They will do in any light house or even a coldframe, where you can keep them a little above freezing. Very little water is needed during the dark cold weather. In this condition they will do well till end of February, when the increased light and heat will start them sending up cuttings. A new variety or one that you are very anxious to increase can be transplanted on a bench after flowering and in a temperature of 50 degrees will be giving you cuttings all winter, but where you have plenty of stock the rest during winter is most beneficial to the vigor of the future plants.