The Shreveport year in pollen
Pollen seasons in Shreveport: tree pollen January to May, grass April to September, and ragweed from early August until the first frost, around November 24.
Tree pollen
Grass
Ragweed
When does ragweed season end in Shreveport?
Ragweed season in Shreveport typically ends with the first frost, around November 24. Some years it comes as early as November 16, some as late as December 1.
A light frost around November 24 knocks the season down; the hard freeze that finishes it usually follows by December 10. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Shreveport pollen year
| Allergen | Typical season |
|---|---|
| Oak | February to May |
| Pine | February to April |
| Eastern red cedar | January to March |
| Pecan | April to May |
| Grass | April to September |
Season-by-season detail is on the Louisiana page.
Nearby calendars
Frost dates for Shreveport come from the Shreveport Dwtn Airport weather station's 30-year records. Season windows reviewed August 2026.