Mugwort pollen
A late-summer weed of roadsides and waste ground, potent enough to cause symptoms at counts a tenth of what birch needs. It overlaps with ragweed and cross-reacts with it, and also with celery, carrot and several spices.
When it is in the air
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Where it dominates
Central and eastern Europe, from Germany eastwards, and common through the Balkans.
What the levels mean
| None | < 5 |
| Low | 5 – 24 |
| Moderate | 25 – 49 |
| High | 50 – 199 |
| Very high | ≥ 200 |
Concentrations in grains per cubic metre of air. These bands come from published clinical evidence but have not yet been checked against measurements for this species.