- 1). Take a 6-inch to 8-inch cutting from a tip of one of the branches from the Rosa multiflora Thunb. plant, preferably a branch that has rose hips on it, using a pair of pruning shears. Remove the leaves from the bottom 2 inches of the branch and set the cutting in water to keep the cut moist.
- 2). Prepare a planting site in a spot outside out of direct sunlight in the late fall, from November through January. Amend the soil if necessary with sand, peat moss and ground root mulch to form a well drained but moisture-retaining soil at least 6 inches deep.
- 3). Dip the end of the cutting in powdered rooting hormone if you have it. The Rosa multiflora often roots from the tips of canes without the aid of hormones.
- 4). Poke a 2-inch to 3-inch hole in the soil with a stick. Set the cutting in place and cover it with a glass jar. Leave the jar in place until the winter temperatures subside in the early spring. Be careful not to leave the jar on after the daytime temperatures rise to more than 50 degrees Fahrenheit or the temperatures inside the jar might cook the plant.
- 5). Watch the cutting for signs of growth in the spring, signaling the formation of roots. Transplant the cutting to a sunny location with a garden shovel. The new multiflora rose will blossom the first or second year, depending on how much it grew. Use the new plant as a rootstock for a domestic rose or for use in a contained growing area where it will not spread.
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