Mounding

I can't overemphasize the importance of this next step.  Will you ever be sorry if you don't follow my advice!  Unless newly planted bushes are mounded, all previous efforts will have been in vain. Bareroot rose canes left uncovered will dry out, and cold winter winds will parch them.

Any of the materials you've just been working with can be used for mounding; a combination of them would be ideal.  Mix the leftover soil from the hole you dug with any of the suggested organic materials.  Heap the combination over the bush until at least half of the plant is covered.  Water it down, not away, and turn your back to the well-planted bush.