USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
This biennial is native to Europe and not N. America. Cultivated forms are grown as the annual vegetable parsnip. It has escaped from gar...Read More
Short video about skin toxicity of this plant. Beware!
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I had thought this plant was Heraculeum Maximum or cow parsnip which, I read, is a monster in its own right. We are trying to eliminate/e...Read More
I thought this might be yarrow coming up wild in my yard, so I wanted to find out about the worm that was destroying it. Turns out both a...Read More
may cause photodermatitis due to xanthotoxin
At the camp my daughter attends in North westen IL, this plant is considered hazardous. Contact with it not only causes skin irritation b...Read More