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Cover the root with mulch, there is a good chance that the evergreens
may come back. Try. have you to lose at this stage? Work some
evergreen food into the ground in early spring. Those bushes have
rather large roots remaining . You may be pleased & surprised at what
may sprout out of the ground . I* m elderly now but can remember
always messing around with my parants evergreens, they are rather
amazing . Best luck. Kitty