Wash pollen off an Ohio Valley home after the main pollen drop, not during it. Washing mid-season clears the film, but pollen keeps falling and you end up cleaning twice — and the siding method matters more than the timing.
Wait for the drop to finish
Pollen coats siding, windows, and concrete in a yellow film each spring. If you wash before the main drop ends, new pollen lands on the clean surface and you repeat the job. Wait until the heavy pollen is down, then wash.
Soft wash the siding
Pollen on siding is best removed with soft washing, not pressure — pressure can force water behind vinyl and strip the finish. Soft washing clears the film and any algae or mildew underneath in one pass.
Do not forget glass and concrete
Pollen on windows and concrete dulls the whole exterior. A squeegee window clean and a surface-cleaner wash on flat surfaces finish the job.
Five-minute self-check
- Is the heavy pollen drop done for the year, or still falling?
- Check siding (soft wash), windows (squeegee), and concrete (surface cleaner).
- Note any green algae under the pollen film.
- Decide if you will wash now or wait for the drop to end.
- Match the method to each surface.
Related reading
See our soft washing and window cleaning pages, and our post on the best time to pressure wash.