Depends if B&B or potted. For potted it's probably a bit root bound
so untwine any roots that are wrapping around but don't loosen the
potting soil. With balled and burlapped simply untie the burlap and
open it, spread it at the bottom of the hole, it'll eventually
decompose... don't break up the earth ball. For more details you need
to give more info; type of trees, size, where.
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