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Each plant is be able to produce about a billion grains of pollen over a season.

Ragweed is normally 1' - 7' ft. in height and is found throughout the United States. The weeds are most commonly found in the Eastern states and the Midwest.

Ragweed produces abundant pollen that is a primary cause of hay fever.  Ragweed pollen can travel far. It has been measured in the air 400 miles out to sea and 2 miles up in the atmosphere, but most falls out close to its source.

Common Ragweed is the most widespread of this genus in North America. It normally attains a height of about 3' ft.

Ragweed grows the best in warm and sunny, newly-disturbed soils, free from competition with other weeds and grasses. It is often found along roadsides, vacant lots, river banks, and abandoned fields.

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Featured Air Purifier: The Surround Air Multi-Tech has a HEPA filter, which is 99.97% effective at removing particles such as allergens. It also has an ionizer, which has been proven in government studies to enhance the performance of HEPA filters. Its UV light destroys micro-organisms such as dust mites and mold.

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