Do you suffer with hay fever or know someone who does? Is there an end to the hay fever season?
Many of us might read the paper or go online to check out how severe the pollen forecast might be for the day and retired plant biologist Dr David Fountain is the pollen forecaster.
He's been looking at the quantity of pollen in the air, what species flower when and where and how pollen is moved around by the weather.
He talks to Jesse Mulligan.