Image of Nabalus altissimus
Source: Reuven Martin
image of Flowering plant
Nabalus altissimus
Tall Rattlesnakeroot
Prenanthe élevée

Obsolete Names

tall white lettuce
tall white rattlesnake-root
prenanthe très haute
No seeds available for this plant.
We currently accept seeds for this plant
Bloom colour: White Bloom period: Jul - Sep
Max Height: 8.0 feet
Max Width: 2.0 feet (spreads by rhizome)
Light condition:
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Moisture medium Tolerates medium soil condition
Lifespan: Perennial plants that will that come back year after year
Gardener Experience:
does not spread Does not spread uncontrollably
plant germinate easy Easy to germinate
plant self seeding Self-seeding
Landscape uses:
school garden Suitable for school gardens
Ecological Benefits: No ecological benefits information available.
Tolerates:
transplantation Tolerant Tolerates transplantation
Special Features and Considerations:

Plant Location

Native to Ottawa region: Yes

Distribution according to VASCAN

Distribution: Nabalus altissimus
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent
View taxonomy on Canadensys

View on iNaturalist

Thrives in Ecozones

  • Mixed Wood Plains

Ecological Benefits

Butterflies Supported by Nabalus altissimus

No butterfly data available for this plant.

Specialized Bees Supported by Nabalus altissimus

No bee data available for this plant.

Plants that grow in similar conditions, that bloom at the same time.

Complementary Plants

Substitute For Non-Native Plants

  • Sorbaria sorbifolia (False spirea)
  • Aruncus Dioicus (Goat's Beard)
  • Polygonatum odoratum (Solomon's Seal)

Sowing Information

Download Sowing Label (PDF)
  • Sowing depth: Surface sow
  • Sow anytime
  • Stratification duration: 0 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: September
  • Harvesting indicator: Seeds have become fluffy and can be easily removed by shaking on gently pulling off from stem
  • Harvesting mean: Cut stem (including pods), let air dry in paper bag, then shake seeds off after a few days
  • Seed viability test: No test needed before donating
  • Packaging measure: 1 rounded 1/8 teaspoon
  • Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
  • At least one cultivar: No, you can donate without knowing the source as there are only straight species
  • No harvesting video available at this time.

Toxicity Notes

Inadequate information on toxicity found.