The name of phenological process | Description | The required heat units (degree days) | The cumulative thermal units (degree days) |
First | Bud formation | 32.4 | 32.4 |
Second | Bud break | 80.4 | 112.8 |
Third | Flowering | 73.2 | 186 |
Fourth | Growing fruit | 1977 | 2163 |
Fifth | Fruit ripening | 623 | 2786 |