When to uncover Winter rootings?
After mixed success with potted rootings, I decided to try something different. I took 5 cuttings from the rose in the late Fall, trimmed them, and just stuck them into the ground under a healthy rose shrub, stuck jars or soda bottles upside-down partway into the soil over each one, and then walked away. Waited a couple months before I checked on them through the bottle glass, and when I did, all were still green and looked promising. I've checked them occasionally since (without lifting the bottles) and all have continued to look promising. Now I think I'm seeing some sprouting on them (yay!). Never having rooted this way before, I find myself unsure when I should uncover them. I'm thinking I should leave them covered because of frost, but if they actually leaf out they may start touching the sides of the jars, and I suspect that's bad. I don't want to disturb them too early and kill them, but I will need to dig them up at some point... Advice, please?