Canadian Grass Pollen Allergy Guide

Canadian Grass Pollen - Infographic

What to Know

Grass pollen allergies are at their worst in Canada between mid-May to the end of July.1

Track local pollen levels by following REACTINE® on Twitter at @ReactineCA.

Common Pollinators


Where: All provinces and territories except Nunavut

When: May – August


Where: BC - Quebec

When: March – June


Where: BC, Nova Scotia, PEI and Quebec

When: March – July