Planted some Midnight butterfly bushes and they have been blooming since they were put in, but I know nothing about trimming these plants. All the blooms are now dead but the plants are still green; and with freezing weather coming, I am lost as what to do with them.
You can normally deadhead the shrubs without any ill effects; however, with winter weather on its way, it may be better to leave it until spring, as the dead flower growth may actually provide some winter protection. This article should help you with pruning a butterfly bush: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-pruning-how-to-prune-a-butterfly-bush.htm
What does a pruned butterfly bush look like? Mine is about 20 feet and against a fence (now Dec. ). Looks terrible--dead flowers. Desired length is about 6-10 feet in summer.
Butterfly bushes will take severe pruning. Some people even cut them back to the ground yearly. The next time you prune, simply prune it to the height and shape you would like. It can handle this with no problem. This article may also help: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-pruning-how-to-prune-a-butterfly-bush.htm
I've been told that I can start a new butterfly bush from the cuttings of an existing bush when I prune it. What is the best way to start a new plant from the cuttings? Any special soil or fertilizer? How long before it can be moved outside?
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/propagating-butterfly-bush.htm
I need to know when and how to properly trim a Butterfly bush
My mother's beautiful butterfly bush was severely damaged during the last winter storm here in New York. can I prune it back now even with the possibility of getting more snow, or should I just wait until spring?
I would wait until spring, just in case of further snow. The damaged limbs will actually protect the rest of the plant in the snow.
I was just curious what would happen if I did not prune my butterfly bushes. They are pretty big now and I hate, every year, to have all that cut brush, branches, etc.that I have to deal with.
Nothing bad happens if you do not prune them. They just get bigger, really. Many people prune to keep them smaller and in a more "formal" shape, but if you do not prune, they simply get bigger and have a more wild shape.
My blue butterfly bush has no green emerging. Since it's a perennial, I'm hoping it made it through this cold southeast Texas winter. Is this a tough bush?
You know, sometimes butterfly bushes just take a bit longer to come up after a hard winter. It should be able to take the cold and may just be taking its sweet time coming up.
You can check the roots if you want, to see if they are still pliable and alive, but I would give it at least another month before writing it off.