Common Monkshood (Aconitum napellus)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Perennial

Common Monkshood
Aconitum napellus

 
Features
Tall stately spires of true blue flowers. Glossy dark green foliage 
 
Culture
Full sun with afternoon shade in soils that are moist but well drained. Moisture should be consistent but not overly wet and swampy. 
 
Cultivars
'Album' 3 feet, white flowers in July, August 
 
Mature Height
3-4 Feet
 
Size
Tall
 
 
USDA Hardiness Zone
3 - 8 
 
Bloom Color
Blue
 
 
Bloom Season
September - October
 
Soil Conditions
Moist, Well-Drained
 
 
Exposure/Light Requirements
Partial Sun/Shade
 
 
Foliage Color
Green
 
 
Pests and Problems

Environmental Damage

Fungal Disease


Additional pests and problems that may affect this plant:

Verticillium wilt, sclerotinia, leaf feeding caterpillars
 
Additional Notes
Plant tuberose roots in the fall and set the crowns just beneath the soil surface. Do not disturb established plants. Difficult to divide and transplant successfully. All parts of the plant are considered poisonous. Reported to be deer and rabbit resistant.

 

 
Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic