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APPLE 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

 

  Silver Tip Green Tip Half-inch Green
  silvertip greentip half green
10% kill 15 18 23
90% kill 2 10 15
  Tight Cluster First Pink (Pink) Full Pink (Open Cluster)
  tightcluster first pink full pink
10% kill 27 28 28
90% kill 21 24 25
  First Bloom (King Bloom) Full Bloom Post-Bloom
  first bloom (king bloom) full bloom post bloom
10% kill 28 28 28
90% kill 25 25 25