My Fireworks has been slow growing up to this point; it's been in the ground 3-4 years. Maybe someone else can speak about the size of Fireworks in their garden. The Jackmanii has viticella parentage, so it can get large, quickly.

Some of us in the colder zones are experimenting with cutting back group 2's after the first flush, hoping to get a 2nd, but some of mine never stop blooming. Early tests seems to point to our growing season being too short to get rebloom on most(?) group 2's but people have had success. You should experiment in your own garden. Some of my group 2's are still blooming well.

Don't cut back group 3's. By the time most of them have finished blooming, it will be close to fall. I don'think there is anything to gain, and the green vine and the interesting seedheads looks nicer than a bare arbor, but that is just my opinion. Although there isn't good information on how beneficial deadheading clematis is, it won't hurt and perhaps it will help produce more blooms.

I prune my group 3's by half in late fall as soon as the plant is dormant, then do the final pruning in early spring.

Thanks janetpetiole. Does anyone know how to get fireworks grow faster and get more blooms. My fireworks only have 4 blooms for the entire plant. However, my jackmanni blooms like crazy. I just don't understand why my fireworks and jackmanni have such a big difference for the blooming. I water and fertilize them the same time and put so much care for them, but they grow differently! Did I do anything wrong? Is it because fireworks is type 2 and jackmanni is type 3, that's why type 2 would not get as much flowers as type 3?
Thanks in advance