The monkshood plant is commonly called Aconitum napellus, this plant is a perennial plant grown for its lacy, light green foliage and tall spikes of bluish-purple flowers. Aconitum napellus can survive throughout USDA plant hardiness zones four to eight. The monkshood plants are sensitive to temperature extremes and must be grown under shade in warmer areas. Aconitum napellus grows reliably from seeds when they are exposed to cold temperatures for several weeks to break their dormancy. This can be accomplished by sowing the monkshood plant seeds directly in the garden in autumn, or by cold-stratifying them before sowing them indoors.
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