Wisteria

Question

Wisteria is loaded with blooms but they are very small–about the size of a large lemon. Other years they were very big.

Answer 1

Try to limit the nitrogen and offset it with some phosphorus, like bone meal, to help promote more lush blooms. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm