Answer: Guava trees are hardy down to about 29 degrees. An established tree can tolerate frost but young trees are generally killed by it. Wait a month or so before doing anything drastic such as digging and replacing your guava. You may only need to prune away the damage and the tree will produce healthy new growth. Prune it back now and give it 4-5 weeks to show some signs of life. I think it will rebound.
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