Do Blackberries Need Fertilizer?
Do Blackberries Need Fertilizer? Do Blackberries need fertilizer? Blackberries require at least yearly applications of a nitrogen-containing fertilizer for good growth and fruit production. Apply 5 to 6 pounds of 20-20-20 or ammonium sulfate (21-0-0) fertilizer per 100 feet of row. Do blackberries like fertilizer? Blackberries respond well to any nitrogen-rich fertilizer, but blueberries require