no fruit

Asked August 17, 2019, 8:31 PM EDT

I have 2 blackberry bushes side by side on a trellis, one side is full on fruit the other has never produced fruit they are both 2-3 years old, both are growing and look healthy

Adams County Colorado

1 Response

There are several reasons that blackberries may not be doing well

There are several factors that can cause little or no fruit production on established plants. One that everyone thinks of is improper pruning – removing canes annually on summer-bearing (floricane) types that only produce on canes during their second year of existence. Note that you should prune fall-bearing (primocane) types annually—in their first year of existence—after harvest in the fall.

It is unknown what your soil is like, so make sure that it is amended properly, with good drainage. Proper watering of one inch per week and thinning to eight inches between canes is recommended.

Viruses are perhaps a more common reason for lack of production. A planting is productive for about ten years and yields best in the first five years after planting. Aphids introduce various viruses, which accumulate in a plant over time. These viruses produce no obvious mosaic or visible plant symptoms. Remove plantings after ten years or when they begin to yield poorly and make a new planting, preferably in new soil. Obtain virus-free planting stock from reputable nurseries. Don’t plant donated rooted suckers from another gardener because they might be virus-riddled. Poor-quality fruit can also be due to viruses such as Crumble-berry virus which causes exactly what its name implies.

It is unknown what your soil is like, so make sure that it is amended properly, with good drainage. Proper watering of one inch per week and thinning to eight inches between canes is recommended.

Do you know if they are the same variety or different? Many blackberries do not grow well in Colorado and will not produce fruit.

Sorry I don't have a definitive answer.