Answer: Good question! In most instances you should not amend the planting holes for trees or shrubs because in doing so you'll encourage the roots to stay in the rich, loose soil rather than spread out and explore the native soil. This can result in poor rooting, shallow rooting and girdling of the roots (where they grow around and around and eventually strangle themselves). To avoid this, and to still improve the soil where your new trees and shrubs will be grown, amend a large planting area such as an entire garden bed rather than just the planting hole. This will give a large area for the new roots to spread out and as the roots mature and grow larger they will be more able to tolerate the native soil.
Best wishes with your new fruit trees~!
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