Well there are lots of variables with pH, soil fertility, and the amount of sunlight being the main factors. If all these factors are good we commonly see trees 12'-15' in five years. I would highly recommend a soil test as they are not expensive, they tell you what you need to know to make decisions on what to add to the soil to help plants grow to their full potential. Sandy soils usually benefit greatly with soil amendments. Thank you for the question!
I planted them on a ridge where they get sunlight all day and it's pretty sandy where they're at. I'm sure the PH is low.
What fertilizer (ex.13-13-13) would you recommend?? What age before I can start fertlizing??
Sand is very challenging to get plant started, you must commit yourself to watering on a weekly basis for the first establishment year. No fertilizer will work if your pH is to low as the oaks can't uptake the nutrient. I like osmocote slow release with minors and Miracle grow. Fertilize in the spring to avoid hardening off problems in the fall. Thanks for the questions Hunter
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