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I am not sure if walnuts grow where you live. They tend to grow in colder climates so I wonder if it is a different kind of nut that you are seeing. There are so many different types of nut trees on Earth, it is kinda amazing! It may be good to ask an older person or someone who gardens if they can identify the nut you see. Hopefully it does turn out to be edible and you can collect some!

Oh okay, then I will do that