I also would wait until next Spring to plant into the ground. Pre-order this fall or early winter though. How long has this bed been tied up with plantings? What i'm getting at, is the soil tired in that bed? Maybe spread some manure in September in that bed to (no pun intended) freshen the soil up a bit. If you want to experiment, you could buy 1 rose or 2, place it/them in container/s and try to over-winter it/them in your garage. Just to get the feel of what it is like. On the very coldest days BELOW 20 degrees wrap the container with a old blanket, then take the blankets off when the temps go back up to above 20 degrees. It is ok if your soil freezes. Water just enough all winter to keep them from drying out. When Spring comes, set them outside on warmer days and take them back in when it gets cold until they are ready to be planted. As mad_gallica said, If you think you might want to keep roses over the winter in the garage at some point, get a min/max thermometer and put it in there this winter to get some idea of what the temperatures are in there.

yes. water lightly every other day until established. If you tug a little and it doesn't come out, then it means it has rooted. adjust watering if wet winter. This is when I transplant mine, as I also prefer to work when cool.

Hi One of my favorites is Lobelia especially the variety called "crystal palace". Flowers through winter and last year even reseeded through summer . though some of it died out . Will have to spruce it up . Was going to add a pic but comp won't let me lol it sprawls only gets around 4 inches tall so can be grown in very shallow containers ,I use drip trays . Has a fantastic deep cobalt blue color though there are other colors I have a weakness for blue Another is Fuchsia make wonderful hanging baskets as longs as it's cool. i particularly like the large, intense pink,deep purple which are the most heat sensitive but as long as nights are cool will flower profusely!! Was going to put up some large displays this year assuming summer ever ends?? No use doing it as long as nights are still in the 70's good luck gary

Unfortunately, that width is probably going to limit you :-) The elevated nature of any above ground container exposes it to much colder temperatures than a plant would experience in the ground. Especially the roots, which are far more vulnerable to cold damage than the top growth with even very hardy plants. But the larger the soil mass around them, the greater the insulating factor, so with a large container in a moderately cold zone you can often get away with overwintering plants that would likely not survive in a smaller container. Pretty much any tree or shrub you may choose will easily produce roots that fill up that 10" width, resulting in a root system that will very likely come into contact with the planter walls and therefore be exposed to excessively cold air temperatures. And root damage (resulting in plant death) can occur at temperatures as mild as the mid 20's, depending on species. And you are looking at the possibility of below zero air temps in zone 6 :-(( You might be able to risk it with the selection of some hardy dwarf conifers but they tend to be expensive to use in what is essentially a hardiness experiment at best. I wouldn't recommend any flowering shrub or tree except perhaps something like alpine currant, as the root system will simply get too large too fast. Unless you are inclined to toss money away on this experiment, I'd stick to seasonal plants. You can always stick in cut willow stems or redtwig dogwood stems together with cut conifer greens and hollies if you want some winter interest.