Some of the leading horticultural experts from Gurney's Seed & Nursery share some examples of how to prune a larger tree. In this video, Felix from Gurney's shares tips on how to prune black raspberry plants. The black raspberry plants in this video are two years old and ready to bear fruit! We show you how to get your raspberry plant to grow with vigor, and produce tons of fruit. If you treat your raspberry plants right, they will flourish. The idea is to watch for tip dieback and cut back the late-season growth. Try to imagine how large the load of fruit will be and determine if the cane can support the weight of the fruit. If not, prune the cane back to a healthy length. Browse all Gardening How-To Videos