How Can I Produce a Sweet Blackberry?
I had a beautiful bush full of blackberries this summer; however, they were not sweet at all--although I planted a fruit fertilizer spike near the bush. How can I make them sweeter?
Certified GKH Gardening Expert
My guess would be that you may simply be picking them too early. Most people tend to pick blackberries when they are a nice glossy, dark color when in fact you should wait for them to dull in color before harvesting.