Wisteria prefers a fertile well drained soil. Though wisteria will grow in part shade, it probably won’t flower.. If your soil is poor add compost, otherwise wisteria will grow in most soils. Plant in the Spring or Fall. Dig a hole as deep as the root ball and two or three times as wide. Space plants 10-15 feet apart.
Choose a place where it will have plenty of room because they can overwhelm nearby plants as they grow quickly.
This plant on the West Side of my house is probably about ten years old.
This plant on my outdoor fireplace is only a couple of years old. As you can see once it gets going there is no stopping it!
Pruning is the secret to good flowering. Prune wisteria in late winter. Remove at least half of the prior year's growth, leaving just a few buds per stem. If you want a more formal appearance, prune again during summer after traditional flowering. For more blooms, try cutting back the rampant shoots every two weeks during the summer. I will give this a good whack once it has finished flowering.
Each spring, apply a layer of compost under the plant and a 2-inch layer of mulch to retain moisture and control weeds. Some gardeners swear by phosphorus to aide flowering. You can scratch a couple of cups of bone meal into the soil in the Spring and then add some rock phosphate in the Fall. Only water in the summer if rainfall is less than 1 inch per year.
Informally grown, such as here on my back fence where it runs rampant, mature plants need little or no subsequent pruning.
For a formally trained plant, such as here on my eave, cut side shoots back to 6 inches in summer, then shorten them again in winter to 3 buds. I have to be honest mine does not always get the love it should and it still thrives.
Now for the secret to my beautiful wisteria… neglect. My soil tends to be high in phosphorous so I don’t feritlize them at all. Once they are established they also get very little water. We do prune them in the winter, and we also prune them regularly throughout the summer to keep them in bounds. I also have one growing up the front of my house (below) that gets very little sun and blooms as profusely as the others only later. It has just begun to open up now as you can see.
What’s blooming in your garden right now? Have you tried Wisteria? How has it performed for you?