Is White Snakeroot poisonous?
Yes, White Snakeroot (Ageratina altissima) is highly poisonous to both humans and livestock. It contains tremetol, a toxic alcohol, which can cause severe illness or death if ingested.
Ageratina altissima, White Snakeroot, is a perennial herb native to eastern North America. It has small white flowers in late summer and autumn but is highly toxic to hum
Above information is sourced from Wikipedia
Sunlight
Thrives in full sun to partial shade, tolerating deeper shade but with reduced flowering.
Watering
Keep soil consistently moist, especially during dry periods, but avoid waterlogging. Established plants can tolerate some drought.
Soil
Adaptable, prefers rich, moist, well-drained soil
Temperature
Hardy in USDA zones 4-8, tolerating temperatures from -10°C to 30°C. Prefers cooler summer temperatures.
Habitat
Outdoor
Fertilizer
Generally not required in fertile soils. If soil is very poor, a balanced, slow-release granular fertilizer can be applied in spring.
Thrives in full sun to partial shade, tolerating deeper shade but with reduced flowering.
Keep soil consistently moist, especially during dry periods, but avoid waterlogging. Established plants can tolerate some drought.
Adaptable, prefers rich, moist, well-drained soil
Hardy in USDA zones 4-8, tolerating temperatures from -10°C to 30°C. Prefers cooler summer temperatures.
Outdoor
Generally not required in fertile soils. If soil is very poor, a balanced, slow-release granular fertilizer can be applied in spring.
Plant Type
Herb
Plant Category
Flowering
Plant Place Type
Ground, Garden
Plant Environment
Outdoor
Lifespan
Perennials
Plant Height
0.5-1.5 m
Spread
0.3-1 m
Growth Rate
Moderate to fast
Dormancy
Winter dormancy
Leaf Color
Green
Leaf Type
Ovate to deltoid, serrated
Flower Size
4-8 mm
Optimal Sunlight Lux
60000
Weed Status
Yes
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Toxic for humans
Yes
Rating: 9/5
Toxic for pets
Yes
Rating: 9/5
Edible
No
Contains tremetol, a toxic alcohol, which causes 'trembles' in livestock and 'milk sickness' in humans who consume contaminated milk or directly ingest the plant. Symptoms include muscle tremors, weakness, vomiting, and liver damage.