Western Water Hemlock
Cicuta douglasii

Family: Apiaceae (ay-pee-AY-see-ee) (Info)
Genus: Cicuta (sik-YOO-tuh) (Info)
Species: douglasii (dug-LUS-ee-eye) (Info)

Category:

Biennials

Height:

36-48 in. (90-120 cm)

Spacing:

6-9 in. (15-22 cm)

Hardiness:

USDA Zone 2b: to -42.7 C (-45 F)

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

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)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade

Danger:

All parts of plant are poisonous if ingested

Bloom Color:

White/Near White

Bloom Time:

Mid Summer

Foliage:

Grown for foliage

Blue-Green

Other details:

May be a noxious weed or invasive

Soil pH requirements:

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

Plant is viviparous

Seed Collecting:

Wear gloves to protect hands when handling seeds

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

This plant has been said to grow in the following regions:

Merced, California

Isle, Minnesota

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On Feb 11, 2005, melody from Benton, KY (Zone 7a) wrote:

The swollen bases of the stems and unusually thick roots have horizontal chambers inside, a feature that helps identify this deadly poisonous plant.

The toxins rapidly affect the nervous system, causing severe convulsions and usually death.

Children have been fatally poisoned by blowing on whistles made from the hollow stems.