Return to Control-pollination of Fraser fir
| Stage | Description | Control-Pollination Step |
| 1 | Buds containing female small with tight bud scales | |
| 2 | Buds enlarging with spreading scales but strobilus completely enclosed | Install isolation bags |
| 3 | Strobilus emerging through tip of bud scales | Late for bagging, conelets must be bagged before Stage 3 |
| 4 | Strobilus extending at least 1/3 to ½ beyond bud scales | Early for optimum pollination results |
| 5 | Strobilus extending fully from bud scales and the space between bracts and bud scales open | Apply pollen for optimum results |
| 6 | Space between bracts and cone scales closed | Late for pollination, remove isolation bags |
Table 1. Developmental stages of female strobili and appropriate control-pollination steps.