- Wisteria Fertilizer
By Country Joe of Country Joe’s Landscaping (retired)
Planted that wisteria and you’re still waiting to see it bloom ten years later. Here’s something that will help.
Go to a good nursery store and buy triple phosphate this will be 0-0-46 or higher on the label. Sometimes used for potatoes and other root crops, but also works very well for flowering vines.
Take one 8 ounce cup and sprinkle at the drip line. Wash the fertilizer into the ground with a sprinkler. Do it in the spring or the fall, but never more than once a year. This will cause the vines to grow stronger, happier, healthier roots. The more roots you have the more flowers you produce.
It is not uncommon for a wisteria to take ten to twenty years to bloom if it is not well tended. So feeding them is very important.
After this process, I have seen wisteria bloom in the spring, but produce random flowers through out it’s growing season.