According to latest Llama 3.1 405B:

Yes, it's perfectly fine to plant trees in the fall. In fact, fall is often considered one of the best times to plant trees. The weather is generally cooler, which reduces transplant shock, and the soil is still warm from the summer, promoting healthy root growth.

Fall planting also gives trees a head start on establishing themselves before the heat of summer, and the roots have a chance to develop before the ground freezes. Additionally, many nurseries and garden centers offer discounts on trees in the fall, making it a more budget-friendly option.

Just be sure to plant your tree about 6-8 weeks before the first frost to give it enough time to establish itself. Also, choose a tree species that is suitable for your climate and soil type, and follow proper planting techniques to ensure the best chance of success.

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