In article , "TheKeith"
writes:

This also helps
rinse the pollen off the tree. Although pine trees aren't a major
source of tree pollen, they can trigger hay fever if you get a big dose
of the powder right in your face.

Hi j
Nice article, but nitpicker that I am, I will make this comment:
pines do indeed produce abundant pollen, and it is wind borne,
covering lakes, creeks, the ground, your car, picnic tables,
with a fine yeloow-green powder, but not at this time of year.
Pollen is produced in the Spring/early Summer, so I doubt much
would still be on the needles, certainly not going to "get a big
dose of the powder in the face."

Emilie