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Horseweed Erigeron canadensis

Other Common Name(s):

Previously known as:

  • Conyza canadensis
Description

Horseweed is a winter annual in the aster family (Asteraceae). Peak germination is in late autumn and early spring but sporadic germination may occur anytime except summer. It forms a rosette of hairy leaves. In spring, plants bolt upright 3 to 6 feet tall. Individual flowers are small, with white ray flowers and yellow disk flowers.  Do not let plants go to seed in the nursery. Control horseweed around the property to prevent spread. When hand weeding, remove completely as plants can re-sprout from broken stems. Horseweed can be managed by preemergence broadleaf herbicides.

Note: glyphosate-resistant horseweed has been reported in areas where glyphosate-resistant crops are grown.

Cultivars / Varieties:
Tags:
#annual#white flowers#weed#weedy#weeds#winter annual weed#daisy-like#countryside#victorian garden#not invasive#arable land#annual weed
 
Cultivars / Varieties:
Tags:
#annual#white flowers#weed#weedy#weeds#winter annual weed#daisy-like#countryside#victorian garden#not invasive#arable land#annual weed
  • Attributes:
    Genus:
    Erigeron
    Species:
    canadensis
    Family:
    Asteraceae
    Life Cycle:
    Annual
    Country Or Region Of Origin:
    New World
    Distribution:
    wind
  • Whole Plant Traits:
    Plant Type:
    Annual
    Weed
  • Flowers:
    Flower Color:
    Cream/Tan
    White
  • Leaves:
    Leaf Color:
    Green
    Hairs Present:
    No
  • Stem:
    Stem Color:
    Brown/Copper
    Green
    Red/Burgundy
    Stem Is Aromatic:
    No
  • Landscape:
    Landscape Location:
    Lawn
    Problems:
    Weedy