Black Walnut

Juglans nigra
This native tree likes full sun and can grow to heights of 60-85 ft. It has a large taproot so it is difficult to transplant.  The dark brown, fine, straight-grained light-weight wood is valuable for furniture, gun stocks and veneers. The nuts are enjoyed not only by humans but also woodpeckers, squirrels and other wildlife.  Actually, the nuts are very hard to crack so the walnuts we usually see in the supermarkets are the softer English walnuts.
A saying goes "Late to leaf early to fall". This tree usually doesn't leaf out in the spring until the daytime temperature is 70 and will start to drop  their leaves in autumn when the daytime temperature starts to fall below 65 degrees.
Allelopathic is the key word to describe this tree to gardeners. This describes the release of chemicals from the roots and other tissues of the black walnut that harm other organisms beneath it, thus decreasing competition for the tree. So, from a practical standpoint, be advised against trying to grow anything under a black walnut tree. Another characteristic is the pungent but spicy odor the tree gives off from the leaves, stems and fruit.
Wikipedia, ODNR

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