Only 1 cutting to root: which method should I use?
I posted before about our old Granada and wanting to replace it, but a few of you suggested I try to root cuttings instead. Well, life happened and I never got around to it. So when we pruned the roses this month we removed the only remaining cane [insert sad face here] and put it in a bucket of water. The cane has 1 stem. So, unless the cane roots in the bucket of water, we have only 1 chance! And I want to be sure this works.
I have access to all the materials and am planning to use the bottom of a milk bottle with the top of a juice bottle and sterile soil or perlite. I would like to use a rooting compound --- but which one would give the best results? I have a bottle of liquid seaweed in the shed. Finally, we have a kitchen garden window that faces south-east and gets some direct and some bright indirect sun. Or, we have a garden full of plants to protect it from full sun.
If you were commissioned to root a single cutting of a beloved rose, what method and materials would you use?