The Alaska year in pollen

When does ragweed season end in Alaska?

Alaska has no ragweed season — it's the only state where the plant doesn't grow.

Tree pollen in Alaska

Tree pollen in Alaska starts in mid-April, and alder is usually first out. Birch — the bigger problem for most people — follows April to June. Mild springs pull the start earlier.

Grass season

Grass pollen in Alaska runs June to August, heaviest mid-June to late July. The culprits are cool-season lawn and meadow grasses — timothy, bluegrass, orchard grass — which flower in one early-summer wave. More on grass seasons.

City calendars

• Anchorage
• Fairbanks
• Juneau

Common questions

When does ragweed season end in Alaska?

Alaska has no ragweed season — it's the only state where the plant doesn't grow.

When does allergy season end in Alaska?

In Alaska, tree pollen wraps up by June and grass by August — with no ragweed, the pollen year ends there.

When does tree pollen start in Alaska?

Tree pollen in Alaska starts in mid-April, and alder is usually first out. Birch — the bigger problem for most people — follows April to June. Mild springs pull the start earlier.