Barcelona
Pollen in Barcelona: street map, calendar and trees
Barcelona publishes an open inventory of around 222,800 geolocated urban trees, including their species. By matching this catalogue with each species' flowering cycle, Polen-tracker creates a street-level pollen map that is far more detailed than regional reports.
A street-level pollen map
Most alerts provide a single pollen level for all of Barcelona. Tree pollen is local, however, and the mix of species varies greatly between neighbourhoods. Every point on the map is a catalogued tree, while the heat map summarises the density of flowering species that affect you.
Which trees pollinate in Barcelona, and when
The main taxa in Barcelona's urban-tree inventory, with their pollen season and relative allergenicity:
| Tree | Pollen season | Allergenicity |
|---|---|---|
| London plane | March–April | Very high |
| Cypress family | December–March | High |
| Olive and ash | April–June | Very high |
| Mulberry | March–April | Medium |
| Pine and cedar | March–May | Low |
| Pellitory (not a tree) | Most of the year | High |
Grasses and pellitory are important allergens but are not trees. They appear in the calendar as aerobiological information, but are not yet used in the map or personal index.
Neighbourhood levels and weather
Polen-tracker combines the density of flowering trees with current weather. Wind and dry air keep more pollen airborne, while rain washes it out and high humidity weighs it down. The home screen shows today's neighbourhood ranking and a personal daily index.
Advice for high-pollen days
- Ventilate early in the morning or after rain.
- Wear sunglasses and, during strong peaks, a mask outdoors.
- Avoid drying laundry outside and shower when you get home.
- Check the map before planning routes or outdoor exercise.
Try it with your city
Polen-tracker is free, requires no account and works on mobile. Open the map or calendar and filter by the trees that affect you.