I Bought One Blackberry Bush 4 Years Ago, and Still Doesn’t Blossom

Question

Why doesn’t my blackberry bush blossom? It is very healthy and I bought from a reputable nursery. It continues to grow and spread, but still no blossoms, so no fruit.

Answer 1

The amount of nitrogen is too high, which results in more foliage growth and little to no blooming/fruiting. Add a phosphorus rich fertilizer or bone meal to the soil to encourage flowering, and in turn more fruiting, and this should help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm