pin oak in Northeast, when to apply Iron supplement?

Antonio Marra
February 25, 2019

I have a pin oak that is suffering from iron chlorosis. I have the Medicap iron tree implants i want to drill into the trunk this spring per the instructions. I am in NY, when should I apply? Anytime in March or should I wait until late March early april? I know it should be before the leaves start to come out but dont recall when that typicall is.

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