The best time to fertilize blackberries is in the early spring right before they start pushing new growth. They like slightly acidic soil so go with a 10-20-10 formula granular fertilizer. How much will depend on the number of plants and the square footage of your growing zone—apply according to the directions on the bag.
The best time to fertilize blackberries is in the early spring right before they start pushing new growth. They like slightly acidic soil so go with a 10-20-10 formula granular fertilizer. How much will depend on the number of plants and the square footage of your growing zone—apply according to the directions on the bag.