Question
We live in central Florida, we just bought 3 sago palms that was nice and green. Only after being in the ground 2-3 weeks the leaves are turning YELLOW, we did not use mulch but we did use about a inch of small stones  adn put around each tree! would this cause the leaves to turn yellow! People on both sides of us both have sagos and theirs look so nice!
These trees was not root bound either, is this what happens with them when you first plant them???? Our neighbours we askes dn they do not seem to know why this  has happen to ours palm trees either as they said theirs never turned yellow when trans potting them!
Can you help us?
Thanks in advance!
Bob

Answer
Hi Bob.        reasons of leaves turning yellow
OLD LEAVES MAY TURN YELLOW from over watering or too much fertilizer.   

NEW LEAVES MAY TURN YELLOW from excess fertilizer or poor soil conditions.  

Note: Once leaves turn yellow or brown, they should be removed from the plant.

Nutritional: Palms are very susceptible to nutrient deficiencies of nitrogen, potassium, magnesium and manganese. Symptoms include yellowing, streaking or even spotting of the fronds. Following a regular, balanced fertilization program for palms is important, especially in the sandy regions such as the outer Coastal Plain, where micronutrient deficiencies typically occur.

Insects and Diseases: Diseases that may affect palms and cycads include fungal leaf spots and root rots. Common insects that affect palms include spider mites, palm leaf skeletonizers and scale insects. Scale insects and mealybugs commonly attack cycads.

Chemical control of diseases and insects on large trees may not be feasible since adequate coverage of the foliage with a pesticide may not be possible.