They look like they're perfectly rooted. I'd simply pot those to an 'Anderson tree band pot' that's taller than the root-system. Everyone who uses Anderson band pots uses the larger of the 5" size, however, your plug looks to already be 5" tall so, use the 9" tall band pot. I'll provide you a link. After your plants are fully-rooted & after grafting, just be sure to tease all the roots prior to planting. You'll want to inspect all roots that are container-grown, always. Dax Here is a link that might be useful: Grower's Nursery Supply, Inc.

Hi Jon, Abies firma is cold hardy to USDA zone 6 and abies koreana to zone 5, so you should be fine. Having said that, I'm not sure how to define cold or heat hardiness of hybrid trees. That is, is hardiness primarily defined by the rootstock or the scion? Maybe some of the more knowledgeable folks around can answer that question.

Yes, it definitely does well in your area. One of the best looking trees, PERIOD, not just conifer(!), in the Rutgers Arboretum is their [Abies firma[(https://www.houzz.com/discussions/a-few-pictures-of-unusual-and-or-unique-hollies-at-rutgers-dsvw-vd~2937296)! I know cultivars exist...but I'm definitely not a cultivar collector when it comes to conifers, so I don't have any details. My trusty copy of Jacobson's NALT, which I keep on my computer desk or in the nearby drawer and which without a doubt I consider the definitive guide to the subject of "NALT", lists one called 'Halgren' selected for 'best color', whatever that means. I believe a couple other cultivars have been mentioned here in the past.

I have an Abies koreana 'Silberlocke' that was probably 4 years old when I got it but I now have had for 8 years. I also have a 'Cis' that I have had the same amount of time. Other than the Silberlocke not growing in a Christmas tree shape yet, it is growing well. The Cis is growing like crazy and is already 30" wide and 14" high. They don't have a full sun setting but must be getting enough to grow that fast. I have tried Concolor several times and even the Abies lasiocarpa var. Arizonica 'Glauca Compacta' with no success. I know I did something wrong, maybe too much water or too clay of a soil and should have amended it to get it started. Usually if I can get a plant started I can get it to grow because my soil is very fertile. I just don't know what the Concolor likes I guess. I'm about 67 miles from the Colorado border but there are no Concolors around that I have ever seen. It is hot (many days of over 100 with a lot of wind, 20mph +) and dry in the summers so nothing natural for sure. Although this spring has been wetter (11+inches) than normal which is actually tougher for me than dry because I can't control the moisture that goes into my clay soil. No one that I know of grows Concolors either. I will keep trying and maybe one of those may take one day in the right place. It's only money and you can't take it with you. :)