Pear 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.
| blank space | Swollen Bud (Scale Separation) | Bud Burst | Green Cluster (Tight Cluster) |
|---|---|---|---|
 |
 |
 |
|
| 10% kill | 15 | 20 | 24 |
| 90% kill | 0 | 6 | 15 |
| blank space | White Bud (First White) | Full White | First Bloom (King Blossom) |
|---|---|---|---|
 |
 |
 |
|
| 10% kill | 25 | 26 | 27 |
| 90% kill | 19 | 22 | 23 |
| blank space | First Bloom | Petal Fall (Post Bloom) |
|---|---|---|
 |
 |
|
| 10% kill | 28 | 28 |
| 90% kill | 24 | 24 |