Leaves on Wisteria Plant Turning Yellow and Falling Off

Question

I have three wisteria plants growing in planters. Two are 4 years old and one is 6 years old. The six-year-old plant blooms every year, but the problem is that all the leaves on each plant is turning yellow and falling off. I live in sunny Florida and it’s been really hot, but I water them often. My neighbor has a dog, whom I have seen urinating on my plants. Could you advise why my leaves after all these years are turning yellowing and falling off?

Answer 1

Wisterias are pretty tough, so I doubt it's the dog. Your plants may be pot bound or the soil may be depleted of nutrients. While wisterias don't need much fertilizer, they do need some nutrients to survive. You also may want to read the following article: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-diseases.htm