How mature should a Royal Empress tree be before planting it in my yard?

Question

Recent hurricane took most of leaves

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Answer 1

Your tree should be planted in fall or spring, so if you're still experiencing mild fall weather, you may want to do it now. It is plenty big enough for transplanting. You'll need to consider that the root system of these trees can become highly destructive, so make sure you plant it in an area where it can spread and grow without interfering with wires or structures.

Here's an article:
https://www.gardeningknowhow.com/ornamental/trees/royal-empress/worlds-fastest-growing-shade-tree.htm