Herbert is female, and thus requires a second grape variety as a pollen source.

The article below is mainly about the pollen source from a beekeeping perspective.

The pollen source in a given area depends on the type of vegetation present and the length of their bloom period.

The color of the pollen can identify the pollen source.

Pollen collection works best in an area with various pollen sources throughout the year.

Kay Gray itself is female and requires a pollen source in order to set fruit.

Most nectar source and pollen source throughout the growing season to build up their numbers.

All equipment used for col- lection, including hands, must be cleaned before continuing to the next pollen source.

Massasoit is female, and thus requires a second grape variety as a pollen source for full fruit set.

You would have no high pollen sources directly near you.