What would the reason be for lots of plant growth but very little fruit?
Lots of Plant Greenery, Little Amount of Fruit
Certified GKH Gardening Expert
Too much nitrogen. This causes lots of lush foliage growth but little to no blooms or fruit. You can fix this by adding more phosphorus to the soil either with a phosphorus-rich fertilizer or bone meal. These articles will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm