Propagation in summer from the half-ripe wood is a better and less uncertain method. In June and July, immediately after the blossoms wither, and before the rose has begun its second growth, cuttings should be made of the flower-stems. Each cutting may contain two or three buds. The lower leaves must be taken off; but the upper leaves must remain. Trim off the stem smoothly with a sharp knife below the lowest bud, and as near to it as possible without injuring it.
If the cuttings are taken off with a heel, as above described, the chance of success will be greater. They may now be inserted at the depth of an inch and a half around the edge of a small pot filled one-third with broken crocks, and the remainder with a mixture of loam, leaf-mould, and sharp sand. Now place them in a frame on the shady side of a hedge or fence, water them to settle the soil, and cover them closely with glass. Sprinkle them lightly every morning and night; and, when moisture gathers on the inner surface of the glass, turn it over, placing the dry side inward. If mould or decay attacks the cuttings, wedge up the glass a little to give them air. In a week or two, they will form a callus; after which they may be removed to a gentle hot-bed, kept moderately close, and shaded from the direct sun. Here they will quickly strike root, and may be potted off singly into small pots.
Another mode of propagation, and a favorite one with nursery-men, is practised early in the spring. In this case, the cuttings are made from forced roses, or roses grown on greenhouse rafters. Some propagators prefer the wood in a very soft state, cutting it even before the flowers are expanded. The cuttings may be placed in pots as in the former case, or in shallow boxes or earthen pans thoroughly drained with broken crocks. The soil should be shallow enough to allow the heel of the cutting to touch the crocks. They are to be placed at once on a moderate bottom-heat, covered closely with glass, and shaded from the direct rays of the noontide sun. Their subsequent treatment is similar to that of summer cuttings. They must be closely watched, and those that show signs of mould or decay at once removed.
After the callus is formed, they will bear more air. When rooted, they should be potted into small pots, and placed on a hot-bed of which the heat is on the decline. Towards the end of May, when the earth is warmed by the sun, they may be turned out of the pots into the open ground, where they will soon make strong plants.