Asked April 18, 2024, 11:44 AM EDT
NE Itasca county; Balsam area; mostly sandy soil. We have wild blackberry plants throughout our 40 acres, along trails, etc. They do not seem to produce berries. I have experimented; thinned the plants, pruned back the tops, transplanted to sunny areas, etc. What, if any, type of fertilizer can I apply to try to get these plants to produce? If you have a sugesstion, also recommend when I should apply the fertilizer.
Thanks, Roy
Itasca County Minnesota