How to Grow Roses from Seed
Growing roses from seed is possible but slow: collect seeds from ripe hips, clean them, chill them for 8-12 weeks to break dormancy (stratification), then sow in a warm, bright spot. Seedlings vary and take time to bloom.
Roses can be grown from the seeds inside their hips, though most gardeners propagate from cuttings instead because seedlings do not come true to the parent. To try it, harvest ripe hips in fall, extract and rinse the seeds, and give them a period of cold, moist chilling — eight to twelve weeks in damp medium in the refrigerator — to break their dormancy.
Sow the stratified seeds in a light seed mix, keep them warm and bright, and be patient: germination is uneven and seedlings may take a year or more to flower. It is a rewarding project for the curious, but for reliable copies of a favorite rose, growing from cuttings is far quicker.