Yellow Leaves on Eureka Lemon Tree

Question

I have fertilized my potted lemon tree twice in a five-week period, and the leaves are still yellow and green. I am using a citrus fertilizer (6-4-6). I am in the Bay Area of California, and we have had a cool and wet early spring.

Answer 1

If the leaves are green veined, but yellow else where, the plant has a iron deficiency. This article will help fix that:
https://www.gardeningknowhow.com/plant-problems/environmental/leaf-chlorosis-and-iron.htm