To get the best success, yor rose seed will need a period of stratification (a cold period of about 6-12 weeks). Its a good idea to time this so that it coincides with when they would naturally start to grow in spring – probably around early March, depending on weather conditions. I would look to sowing them in late November/ December and popping them outdoors or if we have a mild winter then stick them in the fridge!
can someone help me. I am trying to propagate roses and planted the stems around 5 weeks ago. The stems beautifully grew leaves etc on its own but today when I took out one stem, it has only grown a callus so far. So my question is how long does it take for the roots to grow? When I started I moistened the soil a bit at that time and since then never again. Each stem is in a pot surrounded by a ziplock bag tied to it. All stems are growing leaves. Should I start watering them more often? Would that mean I have to take the bag off every time and then tie it again? Hoping to find some answers from more experienced people.
To start rose bush from cuttings, once the rose cuttings have been taken and brought to the planting site, take out a single cutting and remove the lower leaves only. Make a small slit with a sharp knife on one or two sides of the lower portion of the cutting, not a deep cut but just enough to penetrate the outer layer of the cutting. Dip the lower portion of the cutting into a rooting hormone powder.
i believe the key to rooting a plant cutting in water is to keep it warm, but not sunburnt in strong full sun. my african violets all seem to root better in water than perlite or soil! the water level is determined by how the mother plant takes water--roses can take lots of water, so root in 3-5" of water. succulents dont like to stand in water, so root in 1/8" of water standing with only the base touching the water. 

Monitor the rose cuttings to ensure they’re hydrated and taking root. Keep an eye on the cuttings to make sure they’re never dried out, as well as to make sure the cuttings are taking root. You can test to see if the roots are growing by gently tugging on the cuttings. You should be able to feel a slight resistance after a week or 2, meaning the roots are growing well.[13]
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