Leach 1 cup of technical tree fertilizer that includes phosphorus, nitrogen, potassium and other essential nutrients into a bucket or pot. Dig a hole about 2 feet deep and pour the fertilizer into the hole. Water the area well with clean water to help dissolve the fertilizer and then spread mulch over the top of the fertilizer. Leave the fertilized area untouched for three to four weeks. Use a screwdriver or hoe to make small holes in the fruit clusters and insert feeding tubes that reach down to the lower nodes. Feed them every two weeks during warmer months and monthly in colder months.