To properly care for queen palm trees, owners must water the plant regularly, and fertilize twice per year in the spring and summer. Remove dying fronds from the tree every fall with a pruning saw by cutting them 3 inches away from the trunk. Clean up any plant matter or debris from the tree's base to prevent disease.
Water with a slow-drip hose at the tree base. For summer temperatures above 100 degrees Fahrenheit, water four or five times each week. During the fall, or when temperatures are in the range of 85 to 100 degrees F, water the tree two to three times each week. For temperatures below 85 degrees F, or during the winter, apply water one or two times every week. During the spring, water two to three times each week.
The soil below the root ball must receive plenty of moisture. Water around the tree in an area equal to five times the trunk's diameter. For instance, a trunk with a width of 1 foot requires watering at a minimum of 5 feet. Insert a soil probe to check water levels in the soil, or insert a long screwdriver into the ground approximately 3 feet from the trunk. Keep watering if the screwdriver does not penetrate the soil.
Nurture the tree with 8-3-9 fertilizer. Micronutrients in the fertilizer should include iron, potassium, zinc, manganese and magnesium. Apply the fertilizer 2 feet from the trunk. Cover all of the root ball, and apply water after fertilizing.