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Horseweed
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A species of Fleabanes, Also known as Canadian Horseweed , Canadian fleabane, Butterweed, Marestail, Coltstail
Botanical name : Erigeron canadensis Genus : Fleabanes

Horseweed, A species of Fleabanes
Also known as:
Canadian Horseweed , Canadian fleabane, Butterweed, Marestail, Coltstail
Botanical name: Erigeron canadensis
Genus: Fleabanes
Add to My Garden
Horseweed (Erigeron canadensis)

Description

Horseweed is a North American herbaceous annual plant with a hairy stem, numerous pointed leaves, and waxy inflorescence. It has been naturalized in Eurasia and Australia, where it is a common weed in urban and agricultural regions. Horseweed can be used in a survival situation to start a friction fire.
Plant Type
Herb
Bloom Time
Summer, autumn
Flower Color
White
Yellow
Leaf Color
Green
* Disclaimer: Content feedback CAN NOT be used as any basis for EATING ANY PLANTS. Some plants can be VERY POISONOUS, please purchase edible plants through regular channels.

General Info

Name story

Mare's tail||Horseweed
If you observe the plant closely, you discover that its stalk has many branches and the branches all grow upwards. What makes it magical is that each branch is covered with short hairs. When the sun shines on it, the shadow cast on the ground looks like a horse tail. So, it is called mare's tail or horseweed.

Symbolism

sanctity, purification, driving away the unwanted

Usages

Garden Use
Horseweed is a tolerant, low-maintenance plant. Often used in the garden to attract wildlife and pollinators, this plant can be put in a sunny or partially shaded area with well-draining soils. Horseweed is drought-tolerant and can be planted in areas where erosion control is needed.

Is the horseweed toxic to humans?

Horseweed is a common landscape and agricultural weed, mainly found on undisturbed lands. It is infamous for being the first weed to develop resistance to the widely used herbicide, glyphosate. What's more, the germination time is flexible, so horseweed can emerge in all seasons except winter, and the seeds spread efficiently like dandelion seeds.
Horseweed has been spreading outside of its native range for centuries and can now be found in grasslands, fields, and many disturbed areas in Europe, Asia, Australia, northern Africa, and tropical parts of the Americas. It is considered an agricultural weed both in its native and naturalized range.

Is it a Weed?

Horseweed is a common annual weed grown in temperate to tropical areas, which often invades farmland, gardens, lawns and open fields. It has a strong vitality, especially it can grow well in both dry and wet soil. The seeds spread rapidly on a wide-scale through the wind, and quickly occupy the habitat of other species. Moreover, it is highly resistant to common herbicides, such as glyphosate, so it is difficult to remove completely.

Toxicity

Horseweed is a low-toxic plant. Some people's exposure to horseweed can cause dermatitis. If discomfort occurs after contact, consult a doctor promptly.

How to Control it

Once the weeds start to flower and fructify, it will be difficult to control them effectively. In fact, the best time to remove weeds is before flowering and fructification because the seeds will spread rapidly after that. So, it is necessary to remove weeds more often and to take precautions in advance next year. Horseweed is resistant to many herbicides, such as glyphosate. Hence, chemical removal methods are not necessarily effective. However, its propagation can still be controlled by pulling out the root system and pruning frequently. Different methods of removal can be chosen based on different periods.
  1. Mulching: During the seed stage, covering with sawdust, straws or black mulches to effectively inhibit seed germination and the growth of the seedling. Generally, this method is used in winter or spring to inhibit the germination of weed in the soil. If the weeds have already flowered and fructified, this method can be used to isolate the seeds and the soil to prevent the seeds from falling into the soil.
  2. Pulling out: Before the weeds fructify, wear gloves or use tools to pull them out. If it is difficult to pull out weed due to dry soil, adding water to the soil helps to make it easy to remove the roots thoroughly. After pulling out the weed, deep tillage can be adopted to remove the residual roots. This method is especially effective for weeds that are in the seedling stage or low growing size.
  3. Pruning: Pruning weeds before they fructify can effectively control the propagation of weeds. Frequent pruning can inhibit the growth and fructification of weeds and effectively them in the same year. Note: When removing weeds, it is necessary to wear gloves to avoid direct contact with the weeds, especially for the ones that are poisonous, thorny and allergenic. When removing weeds at the flowering stage, special masks should be worn to prevent allergic reactions caused by the inhalation of pollen.
Horseweed (Erigeron canadensis) Horseweed (Erigeron canadensis)
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