Why is that? What can be done to prevent this situation?
The reasons are manifold, and have affected the pollination, resulting in no powder, if there is no outside, it is nutritious, dare not, and if most do not, it is not given good powder, the reason is the high temperature, but drought
Insufficient pollination.Artificial pollination.
Do you want a flower or want to harvest the sunflower seeds, if a disk to sunflower seed would only leave the largest, after flowering pollen comes with feathers or brush lightly and evenly to do artificial pollination each flower can grow into full of sunflower seeds.
