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Peach Freeze Protection: Critical Temperatures by Bloom Stage

Auburn University data for 90% crop loss:

  • First swell: 18 °F
  • Calyx green: 21 °F
  • Calyx red: 23 °F
  • Pink: 25 °F
  • Early bloom: 26 °F
  • Late bloom: 27 °F
  • Post bloom: 28 °F

At 26 °F (early bloom), expect severe damage. Overhead irrigation, wind machines, or row covers are the only practical protections for home orchards.

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