Larkspur Growing Guide



Crop Rotation Group



Average garden soil with excellent drainage.


Full sun.

Frost tolerant

Good. Where winters are mild, seedlings sprout in fall and survive until spring.


Fast growth is encouraged by mixing a balanced organic fertilizer into the soil before planting.


Upright larkspur makes an ideal flower to grow behind shorter mound-forming bloomers.


Single Plants: 11" (30cm) each way (minimum)
Rows: 11" (30cm) with 11" (30cm) row gap (minimum)

Sow and Plant

Sow larkspur seeds where you want the plants to grow in fall, or first thing in spring. Larkspur can be transplanted with care, but plants grow best from direct-sown seeds.
Our Garden Planner can produce a personalized calendar of when to sow, plant and harvest for your area.


Well-pleased plants can grow quite tall and may need staking. In many climates, larkspur will reseed with a little encouragement. Colors include pink, purple, lavender, white and many bicolors.


Larkspurs make wonderful cut flowers. As flowers fade, snip them off with scissors to keep the plants looking neat. Pull up plants when blooms become scarce.


The biggest challenge to growing larkspur is getting the seedlings up and growing. Larkspur is poisonous to pets and horses, but is seldom nibbled due to its bitter taste.

Planting and Harvesting Calendar

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Pests which Affect Larkspur