I found this 5 lb bag of Iron EDDHA chelate (FeEDDHA) for a great price at ViraGrow for less than $60 for this bag locally.
This iron chelate is stable through any soil pH, no matter how alkaline. It is best applied to the soil around the base of the tree where water can move it into the root zone of the plant.
ViraGrow is located at 1100 E. Dehli St., North Las Vegas, NV 89030. It was formerly Western Organics. Two blocks east of Losee Road between Gowan and Colton. 702-497-7371.
It is best mixed with five gallons of water and applied to the soil or immediately washed into the soil after applied to a soil. This product is sensitive to light and must not be exposed to sunlight more than 4 hours. Use this on trees and vines that have shown iron deficiency in the past including apples, pears, citrus, plums, apricots, peaches and grapes.
Also good for ornamentals that have show iron problems including roses, photinia, palms, and many others.
Directions for use. Apply 1/2 ounce per tree trunk diameter at breast height and water it in immediately.