No one around here knows citrus trees. Can you offer a gauge as to how much and how often to use Dr Earth fruit tree fertilizer in my potted citrus?
For new plantings add 2 cups per every 5 gallons of soil. Then apply once a month of growing season. For the season you have in Pennsylvania, what you should try in conjunction with our dry, is our liquid Natural Wonder this will help make the most production out of year season.