Ambrosia psilostachya
TAXONOMY
FamilyAsteraceae
GenusAmbrosia
Zone4
LEARN MORE
Plants of the World OnlineABOUT
Ambrosia psilostachya, commonly known as Western Ragweed, is a perennial plant in the Asteraceae family. It is native to North America and is often found in temperate climates. The plant is known for its allergenic pollen, which can cause hay fever in sensitive individuals. It typically grows in disturbed areas and is quite hardy.
ALSO KNOWN AS
Dunbible-Weed
Perennial Ragweed
Roman Wormwood
Ambrosia californica
Ambrosia californica subsp. californica
Ambrosia coronopifolia
Ambrosia hispida
Ambrosia lindheimeriana
Ambrosia peruviana
Ambrosia psilostachya var. californica
Ambrosia psilostachya var. lindheimeriana
Ambrosia psilostachya var. psilostachya
Ambrosia rugelii
OVERVIEW
VPDCalculate
WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar
WANT MORE TIPS?
DETAILS
Care Instructions
Western Ragweed is relatively easy to care for. It prefers full sun and can tolerate dry conditions. Moderate temperatures are ideal for its growth. The plant does not require high humidity and can thrive in average household conditions. Regular watering is necessary, but the soil should be allowed to dry out between waterings.Soil
Western Ragweed prefers well-draining loamy soil. It can tolerate a range of soil types but thrives best in moderately fertile soil. Good drainage is essential to prevent root rot.Fertilizer
This plant does not require frequent fertilization. If desired, a balanced fertilizer can be applied sparingly during the growing season to promote healthy growth.Repotting
Repotting is generally not necessary for Western Ragweed as it is typically grown outdoors. However, if grown in a container, repotting can be done in the spring when the plant outgrows its pot. Ensure the new pot has good drainage.Propagation
Western Ragweed can be propagated by seeds or division. Seeds can be sown in the spring, while division can be done in the fall or early spring. Ensure the divisions have adequate roots and replant them in well-draining soil.Pruning
Pruning is not typically required for Western Ragweed. However, if the plant becomes too large or unruly, it can be trimmed back in the fall after flowering.Toxicity
Western Ragweed is not toxic to pets or humans. However, its pollen can cause allergic reactions in sensitive individuals, leading to symptoms such as sneezing, runny nose, and itchy eyes.REVOLUTIONIZE YOUR PLANT CARE
Make Every Plant Smart
Plant Monitor
STAYS IN YOUR PLANT
Accurately measures the core metrics of your plant – soil moisture, light, temperature and humidity - as well as compound metrics such as Vapor Pressure Deficit (VPD) and Growing Degree Days (GDD).
Shop Now
