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Where Is the Mexican Poppy Found?

Mexican poppy (Argemone mexicana), hardy in U.S. Department of Agriculture plant hardiness zones 8 through 11, is also known as prickly poppy or thornapple. It bears yellow (sometimes white) 2-inch poppy-like flowers and thistle-like foliage. Leaves are blue-green with white markings, and leaves and stems ooze a yellow sap when broken. It's an annual herb that reaches 3 feet tall and is often seen along roadsides and in old fields and pastures. All parts are poisonous. The Mexican poppy originated in Central America and Mexico but is found in several North American locations including the United States. While this poisonous poppy is a wildflower, it can be grown as an annual nearly anywhere.

  1. Southeast

    • The greatest distribution of Mexican poppy in the United States is in Florida. More than half of the counties have reported at least some wild populations. It is found in only one county in Alabama, North Carolina and Georgia, and mostly along the coastline in South Carolina. It's also found in isolated counties in Mississippi, Tennessee, Arkansas, Louisiana, Delaware, North Carolina and Virginia. Most states in the Southeast have at least a few counties within the Mexican poppy's growing zones of 8 through 11, and all offer the summer heat, these poppies love.

    Northeast

    • Northeastern states have fewer Mexican poppies than the southeastern states. In Connecticut, Pennsylvania, and Massachusetts, they are found along in the coastline counties and in some isolated inland counties as well. In New Jersey they are found in the central counties, and in New York and Vermont they are found in a just few counties. Because there are less areas in the Northeast within the Mexican poppy's growing zone, it is natural the distribution would be less in these states. However, most of these states have the summer heat necessary to support the growth of Mexican poppies.

    Midwest and Texas

    • In Texas, Mexican poppies are only found in the southern counties of the state. They are only found in isolated areas of Nebraska, Indiana, Ohio, Michigan, Kansas, Iowa, Missouri and Illinois. Missouri and Iowa don't have USDA zones beyond USDA zone 5, while Indiana, Ohio, Michigan, Kansas, Missouri, and Illinois don't have growing zones beyond USDA zone 6, well outside the hardiness zones for Mexican poppy. However, there may be secluded microclimates that are protected from cold areas, and because the Mexican poppy is an annual, summer heat may be more important in these areas than cold zones.

    Hawaii, Puerto Rico, Virgin Islands, Canada

    • In Hawaii, the Mexican poppy has been reported on all the islands except the island of Hawaii, also known as the Big Island. They are found throughout other islands such as Puerto Rico and the Virgin Islands. All these places have areas within the Mexican poppy's growing zone. In Canada, Mexican poppy is an introduced species and can be found in isolated areas of the provinces of Manitoba and Ontario. While growing zones only reach as high as USDA zone 6B in these areas, the Mexican poppy can be found there nevertheless, probably because summer heat is sufficient to support growth

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Growing Annuals
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