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PEACH/NECTARINE Growth Stages and Critical Temperatures

 

Typical temperatures in Fahrenheit, at which 10% and 90% injury after 30 minutes exposure, is provided under each bud stage image.

To have a full crop of cherries requires well over 50% bud survival in most years, while apples, pears, and peaches may only need 10 - 15% bud survival.

 

  Swollen Bud (First Swell) Calyx Green 1/4" green (Calyx Red)
  swollen bud calyx green calyx red
10% kill 18 21 23
90% kill 1 5 9
  Pink (First Pink) First Bloom Full Bloom
  pink first bloom full bloom
10% kill 25 26 27
90% kill 15 21 24
  Post Bloom (Petal Fall) Shuck Split
  post bloom shuck split
10% kill 28 28
90% kill 25 25