Answer: Your orange trees need plenty of bright light in fall and winter, cool temperatures, high humidity from daily misting and less water when they are inside the greenhouse allowing the top surface to dry between waterings. Fertilize every 6 months with a time release fertilizer such as Osmocote 14-14-14, also twice a month fertilize with a dilute strength liquid fertilizer such as Miracle Grow. In spring, gradually move the tree outside for the summer and gradually move it back inside in fall. Hand pollinate the flowers by rubbing a Q-tip cotton swab in the flowers in fall and winter to insure fruit.
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