How can I re-root a wisteria vine?
This article should help with that: https://www.gardeningknowhow.com/ornamental/vines/wisteria/propagating-wisteria-cuttings.htm
What is the best wisteria for butterflies?
Any type of wisteria will attract butterflies. Here is information on additional plants that attract these pollinators: https://www.gardeningknowhow.com/garden-how-to/beneficial/butterfly-garden-plants.htm, https://www.gardeningknowhow.com/garden-how-to/beneficial/attracting-butterflies.htm
Wisteria is loaded with blooms but they are very small--about the size of a large lemon. Other years they were very big.
Try to limit the nitrogen and offset it with some phosphorus, like bone meal, to help promote more lush blooms. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
My wisteria vine has been in the ground and growing for about six years, although I have never had even a single flower. Is there something special that needs to be done?
I would guess that the nitrogen to phosphorus ratio is off. The soil may have an abundance of nitrogen, which would result in nice, healthy green growth but little to no blooms. Without the right amount of phosphorus, it will not bloom well. Bone meal is a great way to add phosphorus. This article will also help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm
My wisteria bloomed last spring and this year nothing. What did I do wrong?
This article should help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm
Is wisteria vine deer resistant?
Yes. Both Japanese and Chinese wisteria are deer resistant. The vine has a bitter taste that deer don't like. However, you should keep in mind that deer resistant and deer proof are two different things. If deer get hungry enough, they will eat anything.
Our good neighbor has a beautiful Wisteria vine that has reached the top of his Oak tree and is now reaching our Maple tree with hungry tendrils. The vine is wrapping clockwise. Since I've just noticed that the vine is actually established on several high branches of our tree, I am in need of some diplomatic advice on how to manage his pride and joy on our side of the divide. Will I have to cut a good 1/3 of our tree back? Our neighbors are scientists, Asian and take their gardenening most seriously. We would appreciate some info.
These articles will help with both current pruning and getting it under control: https://www.gardeningknowhow.com/ornamental/vines/wisteria/pruning-wisteria.htm, https://www.gardeningknowhow.com/ornamental/vines/wisteria/controlling-or-getting-rid-of-wisteria.htm