10 Worst Plants for Your Allergies


The pigweed is a family of weeds. There are more than 500 species of pigweed, including common pigweed and tumbleweed. It's an aggressive weed that reproduces by seed, and you'll see it in landscapes, on roadsides, and in pastures, among other places.

Pigweed facts:

  • Pigweed can grow up to 6 feet tall. It has bristly green flowers clustered along the sides and top. The common redroot pigweed has a reddish color at the taproot.
  • Peak time: Pigweed blooms and releases its pollen from spring all the way to fall.
  • Location: You'll find a lot of species of pigweed in the northern and western United States.

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