I have blackberry bushes, 5-6 feet tall. They are spreading and look good. They are 4 years old, and they have NEVER blossomed. What am I doing wrong? Thanks.
Certified GKH Gardening Expert
There are a few things that can cause this. First, the plants are getting too little light. Can you increase the light they get, either through pruing nearby plants or the use of mirrors? Second, they may not be getting the right amount of nutrients. Too much nitrogen or too little phosphorous and the plants will not bloom. Third, they may have been rendered sterile. If your plants were wild or exposed to wild plants, they may have caught a disease. This article will explain more on that: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm