POLLEN ON WINDOWS
Juniper and Pine Pollen on Windows: A Bend Homeowner’s Guide
Central Oregon gets two pollen waves that coat windows, screens and sills. Here’s when each one hits, how to clean it off without smearing it, and how to time your window cleaning around it.
The Short Answer
Western juniper pollinates first, starting in late February or early March and peaking around mid-April. Ponderosa pine follows in May and June with the heavy yellow dust. Rinse pollen off with water before washing, clean the screens too, and save your full window cleaning for late June, after the pine pollen is done.
Central Oregon’s Pollen Calendar
| When | What’s in the air | What you see on glass |
|---|---|---|
| Late Feb to April | Western juniper, peaking mid-April | A fine, light film, worst on windy dry days |
| Mid-April to May | Deciduous trees like birch, cottonwood and maple | Light dust and seed fluff |
| May to June | Ponderosa pine | Heavy yellow dust on glass, sills, decks and cars |
| June to July | Grasses | Light film, mostly near fields and open lots |
Juniper is a much bigger deal here than on the west side of the Cascades, where it’s scarce. In Bend, Redmond and Prineville, open juniper country surrounds town, and dry spring wind carries a lot of it.
Why Pollen Is Hard to Clean Off
Pine pollen is waxy, so it smears instead of wiping clean. Juniper pollen is fine enough to work into screen mesh and window tracks. Both stick to glass when morning dew or a sprinkler wets them and then dries in the sun.
The other problem is the screens. They trap pollen all season, and every breeze pushes it back onto the glass. Clean windows with dirty screens look dull again within days.
How to Clean Pollen Off Windows
- Pull the screens and rinse them gently with a hose. Use a soft brush on both sides, then let them dry.
- Rinse the outside glass from top to bottom to float off loose pollen before anything touches it.
- Wash with warm water and a few drops of dish soap. More soap leaves film.
- Squeegee top to bottom on the shady side of the house, wiping the blade each pass.
- Wipe the sills, which collect a yellow film that holds moisture against the frame.
- Vacuum the tracks before wiping them, or you’ll turn the pollen into paste.
Our screen, track and sill cleaning takes care of the parts that hold the most pollen.
Timing Your Window Cleaning Around Pollen
- March and April: a quick outside rinse is fine, but a full cleaning will be undone by the pine.
- Late June: the best time to book a professional window cleaning, once the yellow dust stops falling.
- Fall: the second cleaning of the year, after smoke season.
Our best time to clean windows in Bend guide lays out the whole year.
Pollen and Window Questions
When does juniper pollen season start in Bend?
Usually in late February or early March, peaking around mid-April. Warm, windy, dry springs make it heavier.
What is the yellow dust on my windows in May and June?
That’s ponderosa pine pollen. It’s heavy and waxy, and it coats glass, decks and cars across Central Oregon.
Should I wipe pollen off my windows dry?
No. Rinse it off with water first. Dry wiping smears waxy pine pollen and drags grit across the glass.
Do I need to clean my screens too?
Yes. Screens trap pollen all season and blow it back onto the glass. Cleaning only the glass rarely lasts.
CALL FOR WINDOW CLEANING
Pollen on Every Window?
Call us in late June and we’ll clean the glass, screens and tracks so the yellow film doesn’t come right back.