
Downtoearthdigs
Answered on March 9, 2017
These links will help you with the timing and with the nutrient needs of Red Oak Trees.
https://www.bartlett.com/resources/Plant-Health-Care-Recommendations-for-Red-Oak.pdf
https://www.gardeningknowhow.com/ornamental/trees/oak/red-oak-tree-information.htm
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