Canadian horseweed.

De un vistazo

Nivel de cuidados

Fácil

Tipo de planta

Annual herb

Luz

Full sun

Luz en interior

Sol directo

Riego

Cada 7 a 14 días

Tamaño adulto

5 feet

Ritmo de crecimiento

Rápido

Rusticidad

USDA 3 a 9

Floración

Mid summer to mid autumn

Cuidados

This plant thrives in full sun and well drained soil. Watch for wilting during extreme heat, though it is quite drought tolerant once established. It is a prolific seeder, so pull it before flowers fade if you want to limit its spread.

Riego

Water only when the top inch of soil feels dry to the touch.

Abonado

This plant generally does not require supplemental fertilizer.

Poda

Remove spent flower heads to prevent unwanted self seeding.

Trasplante

As an annual, this plant is typically not repotted.

Suelo

Well drained, sandy or loamy

pH del suelo

6.0 to 7.5

Temperatura

-20 a 35°C

Humedad

30 a 70%

Seguridad

Personas

The plant may cause skin irritation in sensitive individuals upon contact.

Niños

Keep away from children as the plant can cause skin irritation if handled.

Alérgenos por contacto

The foliage contains compounds that can cause contact dermatitis.

Alérgenos en el aire

The abundant windborne seeds and pollen may trigger respiratory discomfort in sensitive people.

Comestibilidad

While historically used in herbal medicine, it is not considered a food crop and should be avoided.

Cómo identificarla

• Tall, unbranched hairy stem
• Narrow, lance shaped leaves
• Small white flower heads
• Forms a basal rosette initially

Altura

0,3 a 1,5m

Anchura

0,15 a 0,45m

Hojas

green, deciduous

Flores

white, yellow, 0,5 a 1cm

Frutos

tan, Autumn

Problemas frecuentes

• Powdery mildew — A fungal infection that appears as white dust on leaves during humid weather.

Cómo cultivarla

Propagación

seed

Cuándo plantar

spring, autumn

Plant in sunny, open areas to mimic its natural meadow habitat.

Buenas compañeras

• Common Milkweed — They share similar habitat requirements in open meadows.
• Vara de oro — Both species provide late season nectar for pollinators.

Especies parecidas

• Erigeron philadelphicus — It has similar flower structures but prefers moister soil.

Ciencia

Familia

Asteraceae

Género

Erigeron

Orden

Asterales

Clase

Magnoliopsida

Distribución natural

North America

Conservación

It is considered a common weed in many regions and is not of conservation concern.

It thrives in open, disturbed habitats where it acts as an early successional species.

Valor para la fauna

nectar source, larval host plant

Polinizadores

abejas, mariposas, escarabajos

Usos

pollinator garden, meadow restoration, herbal history

Taxonomía cotejada con GBIF.

Lo que más preguntan

Is this plant invasive?

It is native to North America but can act as an aggressive colonizer in disturbed areas.

Does it need much water?

It is quite drought tolerant once established.

De dónde viene el nombre

The genus name comes from Greek words meaning early and old man, referring to the white, hair-like pappus. The species name indicates its origin in Canada.

Bueno saberlo

• It is also known as horseweed.
• The plant was once used to treat various ailments in traditional medicine.
• It is a pioneer species that quickly covers bare soil.