Allergens 101

Johnson Grass

Sorghum Halepense

This perennial grass grows quickly and causes moderate allergic reactions. Johnson grass is considered a damaging weed and is found on cropland, roadsides, wasteland, and along streams and canal banks.

Common symptoms

  • Hay fever

    A runny nose, stuffiness, and sneezing are very common

  • Eye allergies

    Itchy, watery, or red eyes are very common

  • Asthma

    Coughing, wheezing, chest congestion, chest tightness and shortness of breath

Seasons and Regions

 

Northeast

Northwest

Midwest

Southeast

South Central

Southwest

Alaska

Hawaii

January

 

 

 

 

 

 

 

 

February

 

 

 

 

 

 

 

 

March

 

 

 

 

 

 

 

 

April

 

 

 

 

 

 

 

 

May

 

 

 

 

 

 

 

 

June

 

 

 

 

 

 

 

 

July

 

 

 

 

 

 

 

 

August

 

 

 

 

 

 

 

 

September

 

 

 

 

 

 

 

 

October

 

 

 

 

 

 

 

 

November

 

 

 

 

 

 

 

 

December

 

 

 

 

 

 

 

 

Where is Johnson grass found?

Johnson grass is found in most of the humid, warm temperate, and tropical parts of the world, including Australia, Turkey, South Asia, the Mediterranean, and the United States, where it was introduced as a forage crop in the 1830s.

Bottle

Recommended solutions

Avoid the allergen as best as you can and reduce symptoms through over-the-counter medications. If you would like to prevent your allergies from progressing or are looking for long-term relief, talk to your doctor about allergy immunotherapy or find out if you are eligible for NectarRx Allergy Treatment.

  • Check pollen counts daily

  • Wear sunglasses and/or nasal filters

  • Opt for air conditioning

  • Avoid freshly cut grassy areas

  • Shower after exposure

  • Use Benadryl, Claritin, or Zyrtec as needed

  • Treat with allergen immunotherapy