Should you cut the vine down in the fall ?
Hyacinth Bean Vine
Certified GKH Gardening Expert
Yes and if you have the means to till the foliage into the ground, then that will give your soil some extra nitrogen for growth next season. Here is an article with more information: https://www.gardeningknowhow.com/ornamental/vines/hyacinth-bean/purple-hyacinth-bean-care.htm