Red flowering quince is a deciduous shrub that is native to China. The shrub is hardy in USDA growing zones 5 through 8 and reaches a height and spread up to 10 feet. Red flowering quince has glossy green leaves and produces rose-like flowers in the spring season. Propagate the shrub by taking semi-hardwood stem cuttings in midsummer. Take the cuttings in the morning when the plant is hydrated and temperatures are cool.
Clean cutting tools with rubbing alcohol. This will prevent the spread of disease through the open wounds on the plant.
Cut 6-inch-long semi-hardwood stem pieces from the quince plant with a sharp knife. Semi-hardwood parts of the plant are current-year growth that is turning from green in color to firm and woody in appearance. The sections should be approximately 1/2 inch in diameter and contain at least three sets of leaves.
Create a rooting mixture that is equal parts sterile peat miss, coarse sand and perlite. Dampen the mixture with water and fill a rooting tray.
Remove all leaves and buds from the lower half of the stem. Dip the end into rooting hormone to stimulate root growth. Stick the stem into the rooting mixture to a depth of 3 to 4 inches. Space the stem sections in the tray so the leaves do not touch.
Spray the cuttings and soil mixture with water and cover the tray with a clear plastic bag to keep the humidity level high around the stems. Monitor the soil moisture to prevent it from drying out.
Place the rooting tray in a warm location that has indirect bright light. Do not place the tray in a window as the sun will be too hot. Open the plastic covering daily to introduce fresh air around the cuttings and prevent a buildup of condensation which may cause the stems to rot.
Pull lightly on the stem cuttings after four weeks to see if there is resistance from root growth. Remove the plastic covering once the roots reach a length of 1 inch and transplant the cuttings to individual 6-inch potting containers.
Place the individual potting containers in a bright location and continue to grow them indoors for the first growing season. Plant the flowering quince plants outdoors the following spring.