Pollen Counts in Bulgaria
Check daily pollen forecasts, the pollen map, seasonal trends, and all the cities we cover in Bulgaria. Forecasts update every day, so check back regularly during pollen season.
Updated: 29 Oct 2026.
Bulgaria Pollen Map
- Alder
- Birch
- Grass
- Mugwort
- Olive
- Ragweed
Bulgaria's Pollen Seasons
In Bulgaria, tree pollen starts with alder in March. Birch pollen also appears in March and continues through April. Olive trees release pollen in May and June, extending the tree season into early summer for people with allergies.
Grass pollen is measured from May through July in Bulgaria. It is the most common pollen type across the year. June is the busiest month for pollen, when grass is in season along with olive pollen.
Weed pollen comes later in summer. Mugwort releases pollen in July, August, and September. Ragweed follows in August and September, so its season overlaps the last two months of mugwort pollen in Bulgaria for many people.
Pollen Calendar for Bulgaria
Typical pollen calendar for Bulgaria, averaged across 47 cities from previous years. Alder peaks in March, Birch peaks in April, Grass peaks in June, Mugwort peaks in August, Olive peaks in June, Ragweed peaks in September. Use it to see which months each pollen type usually rises and falls.
| Alder | Birch | Grass | Mugwort | Olive | Ragweed | |
|---|---|---|---|---|---|---|
| Jan | 2.5 | 0 | 0 | 0 | 0 | 0 |
| Feb | 19.4 | 0 | 0.3 | 0 | 0 | 0 |
| Mar | 57.3 | 132.1 | 6.6 | 0 | 0 | 0 |
| Apr | 1.3 | 337.5 | 24.9 | 0 | 1.9 | 0 |
| May | 0.1 | 46.3 | 128 | 0 | 20.7 | 0 |
| Jun | 0 | 5.7 | 457.5 | 0 | 22 | 0 |
| Jul | 0 | 0.1 | 263.5 | 68.9 | 1.5 | 1.5 |
| Aug | 0 | 0 | 99.9 | 118.6 | 0 | 180.4 |
| Sep | 0 | 0 | 32.8 | 79.1 | 0 | 240.5 |
| Oct | 0 | 0 | 7.3 | 3.1 | 0 | 0.5 |
| Nov | 0 | 0 | 0.8 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
Values in gr/m³ (pollen grains per cubic metre), averaged across covered cities. Local microclimates vary. Not medical advice.
Places We Cover in Bulgaria
We publish forecasts for these cities across Bulgaria. Check the list to see what is near you, or view them on the Bulgaria Pollen Map above.
Blagoevgrad
Burgas
Dobrich
Kyustendil
Other
Pernik
Plovdiv
Razgrad
Ruse
Shumen
Silistra
Smolyan
Sofia
Stara Zagora
Varna
Veliko Tarnovo
Vidin
Vratsa
Pollen information is for education and planning only. This is not medical advice. Consult a qualified healthcare provider about symptoms or treatment.