Blue Butterfly Larkspur

Light Needs

Full Sun

(At Least 6 Hours Of Direct Sunlight)

Mature Height

1-2 Feet

Mature Spread

1-2 Feet

Growing Zones

3 to 8

The Blue Butterfly Larkspur is easy to grow and adds a pop of bold blue color to a landscape. The Delphinium grandiflorum, or Siberian larkspur, features tall flower spikes bearing bright blue double blooms that open in late May. The long-blooming flowers provide color throughout the summer, and well-timed pruning may encourage another flush.

This perennial has a mounded growth habit. Feature this larkspur near the middle or back of a mixed perennial bed or as a thriller in a container. The deeply lobed foliage complements the purplish-blue flowers. This cultivar is tolerant of heat, ensuring dependable color throughout the summer. Deer often leave this plant alone. Grow the Blue Butterfly Larkspur as a perennial in zones 3 through 8.

Blue Butterfly Larkspur Care

The Blue Butterfly Larkspur prefers rich, moist soil that promotes drainage. Plant it in full sun and water during a dry spell. Fertilize annually with a balanced plant food.

Cut back growth after the flowers fade to encourage dense growth and another round of blooms. Larkspur plants are short lived, but they self-seed readily if blooms are left to fade. Trim the growth back to ground level after the first frost.

Blue Butterfly Larkspur Spacing

The Blue Butterfly Larkspur grows 12 to 16 inches tall and wide. Space each plant 8 to 10 inches apart to create a full and continuous planting.