The wisterias had flowered in the past so there wasn’t a defect with the plants. I gave them a hard prune so all the wisterias energy was directed into fattening up the flower buds. I also gave them a good feed with a slow fertiliser and made sure they were well watered.
Thankfully this spring we have been treated to a magnificent display. Now the challenge is to keep the flowering this spectacular next year and not put it down to this being a very good year for wisterias.