Q.How do I keep wisteria cuttings from dying?
I followed your instructions for propagating wisteria cuttings, but within two weeks they were covered with a white fuzzy mold and all died. Since I have already thrown out the dead cuttings, I cannot send you a picture. However, I have attached a picture of a new set of cuttings that I handled the same way. What should I do to help them survive until they have developed roots?

Certified GKH Gardening Expert
The first group probably had too much moisture. This time, make sure the soil mix is dry before watering and only water enough to moisten the soil. Do not saturate. Also allow the water to drain off before putting the plastic back on.
I would not let the cuttings touch. You can start another pot so you can separate these.
Here is probably the article you reference:
https://www.gardeningknowhow.com/ornamental/vines/wisteria/propagating-wisteria-cuttings.htm