Is it allergy season in Tennessee?

Tennessee's allergy season is one of the longest in the country. Cedar and elm open the season in February — often before winter truly ends. Oak and hickory carry March and April at high levels. Grass builds through May and peaks in June. Ragweed dominates August and September before the season finally winds down in October. There's rarely more than a few true off-months.

Tennessee's geography creates three meaningfully different allergy climates. Memphis in the far west runs warmer and longer — closer to the Mississippi Delta pattern. The middle corridor (Nashville, Murfreesboro) is the AAFA hotspot. The Great Smoky Mountains and Ridge-and-Valley province in the east trap pollen in valleys and extend the season with higher humidity.

West Tennessee — Memphis & the Delta edge

Earliest start, hottest and longest Bermuda grass season

Memphis sits at the northern edge of the Deep South pollen belt. Tree season opens in late January some years. Bermuda grass — the dominant turf grass of the South — grows as a weed along roadsides and runs from May through September at meaningful levels. Ragweed is heavy through October. It's the most compressed and intense allergy environment in the state.

Jan–Feb tree startBermuda grass dominantOct ragweed

Middle Tennessee — Nashville Basin

AAFA top-5 allergy capital; oak and cedar overlap is brutal

Nashville's Cedar-oak double-peak in March and April is what drives its AAFA ranking. The basin geography concentrates pollen — surrounding hills trap particulates, and Nashville's urban heat island extends the season at both ends. Grass season is long and Bermuda is as common as fescue. Ragweed runs hard through September.

AAFA #4Cedar + oak overlapBasin concentration

East Tennessee — Knoxville & Appalachian Valleys

Valley trapping prolongs exposure; oak and tulip poplar in the Smokies

The Ridge-and-Valley province around Knoxville and Chattanooga funnels pollen down into narrow corridors. Oak, tulip poplar, and hickory dominate the Smoky Mountains foothills. Humidity from the mountains keeps pollen aloft longer. The city of Chattanooga sits in a bowl and frequently records higher counts than surrounding areas.

Valley trappingOak + tulip poplarHigh humidity

November and December are Tennessee's clearest months. January is variable — cedar can release during warm spells. The cleanest stretch is typically mid-November through January.

Tennessee's oak and ragweed dominance both carry OAS cross-reactivity. With an 8–9 month season, there's a real chance of overlapping food reactions at different times of year.

Oak pollen

Mar–May

Apples, pears, cherries, peaches, almonds, hazelnuts, carrots, celery

Oak OAS reactions are usually milder than birch-driven reactions. Peeling fruit often reduces the reaction since cross-reactive proteins concentrate in the skin.

Ragweed pollen

Aug–Oct

Cantaloupe, honeydew, watermelon, cucumber, zucchini, banana, chamomile tea

Chamomile tea is a commonly missed ragweed cross-reactor — it's in the same plant family. Avoid chamomile tea at the height of ragweed season.

Not medical advice. If you suspect OAS, speak with an allergist — it can sometimes progress, and symptoms that extend beyond the mouth should be evaluated.