Columbian monkshood Plant Care
Aconitum columbianum Nutt.
Updated · Sources · How we source care data
Aconitum columbianum is a species of flowering plant in the buttercup family known by the common names Columbian monkshood or western monkshood.
Every 7–10 days
Partial shade to full shade
50–75°F
40–60%
At a glance
How do you care for Columbian monkshood?
Water Columbian monkshood every 7–10 days, letting the top layer of soil dry out between waterings, and give it partial shade to full shade. It prefers temperatures of 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
What Is the Columbian monkshood?
Columbian monkshood (Aconitum columbianum) belongs to the Ranunculaceae family within the Aconitum genus. Columbian monkshood is also known as Western monkshood, Monkshood.
Columbian monkshood displays an upright, clump-forming perennial growth habit, reaching up to 4 ft tall with a spread of approximately 2 ft. Columbian monkshood produces tall spikes of hooded, helmet-shaped flowers in various colors.
Leaf size: approximately 6 inches.
How Often Should You Water a Columbian monkshood?
Aconitum columbianum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Columbian monkshood Need?
Columbian monkshood thrives in partial shade to full shade. The optimal light range is 100–1,000 lux. Avoid placing Columbian monkshood in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Partial shade to full shade
100–1,000 lux
What Temperature and Humidity Does the Columbian monkshood Prefer?
Aconitum columbianum grows best at temperatures of 50–75°F. Columbian monkshood prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Columbian monkshood?
Moist, well-draining soil rich in organic matter. Good drainage is essential for Columbian monkshood to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Columbian monkshood?
Feed Columbian monkshood every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Columbian monkshood?
Divide and repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Columbian monkshood?
Columbian monkshood can be propagated through division, seeds. Similar propagation techniques also apply to carmichael's monkshood plant care, which shares the same genus.
Is the Columbian monkshood Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic if ingested, can cause skin irritation
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Columbian monkshood?
Columbian monkshood is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Columbian monkshood Need?
Columbian monkshood grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Columbian monkshood as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Columbian monkshood is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Aconitum genus — compare its care with other Aconitum species on PlantoScan.
Aconitum is part of the Ranunculaceae plant family — browse all Ranunculaceae genera and species.
Columbian monkshood copes with lower light than most plants — browse the full list of low-light plants.
More Aconitum Species
Other Aconitum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Aconitum columbianum Nutt., family Ranunculaceae (first published in Fl. N. Amer. 1: 34 (1838)) — World Flora Online record, IPNI name record.
- Pet toxicity: Columbian monkshood is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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