Need to apply 0.3& IBA (Rooting hormone)not rootone.... stick in well drained soil & mist taking 25-60 days to root.
I stick to basic methods & material because they are time tested

I took cuttings in early summer, dusted them with rooting hormone and stuck them in peat pellets which I had hyrdated by soaking in warm water. Put the peat pellet with cutting in a zip lock bag to keep it moist and set them in a warm shady spot. I admit at this point, I totally ignored them for a while. But in three-four weeks, they had visible roots sticking out of the peat pellets, ready for potting.

Budding, I think, is a good sign. The cuttings are taking in moisture. I rooted rosemary cuttings using method above and they actually bloomed just before I saw evidence of roots. Bit I am no expert.

Flowering quince was one of my first successes at propagation. I hope it is for you also.

thanks for your help, mark