Delphinium andersonii

Anderson's larkspur is a striking western North American native perennial that produces vivid blue-purple flower spikes and does best in partly shaded garden borders with consistently moist, well-drained soil. It is well suited to native and wildflower gardens in the intermountain West and should be planted away from children and pets as all parts are toxic. Deadhead spent blooms to prolong flowering and divide clumps every few years to maintain vigor.