Larkspur

Consolida ajacis

flower

Larkspur is the annual delphinium - 3 to 4 ft tapering spires densely packed with finely cut blue, purple, pink, or white blooms above ferny foliage. A spring-blooming cool-season annual that hates heat and bolts to seed and dies by midsummer, leaving a few weeks of dramatic flower production. Direct sow only; the taproot resents transplanting. The vintage cottage-garden look in a single packet of seed. All parts are toxic if eaten.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Hollyhock — Both are tall cottage-garden classics that look right together at the back of a border
• Foxglove — Cool-season biennial that shares larkspurs spring bloom window and toxicity warnings
• Snapdragon — Another cool-season cut flower that pairs with larkspur in spring bouquets
• Bachelors Button — Cottage-garden partner that shares the same cool spring conditions

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Aphids →

  Hose off colonies and plant alyssum nearby for hoverflies; aphids worsen when plants are stressed by heat

• Slugs →

  Use grit barriers or traps in cool damp spring weather when larkspur seedlings are most vulnerable

• Powdery mildew →

  Space well, water at the base, and accept that larkspur tends to mildew as it dies in midsummer heat

• Toxicity

  All parts of larkspur are toxic if eaten - plant away from areas frequented by pets, livestock, and small children

🌸 Blooms & cutting

Cut larkspur when about a third of the buds on the spike have opened and the rest still show color; the spike continues to open in the vase. Cut deeply - down to a basal leaf - in the cool of the morning. Strip the lower leaves and place stems immediately into cool water. Vase life is about 7 to 10 days. Larkspur dries beautifully if hung upside down in small bundles in a warm, dry, dark spot.

🥗 Nutrition & benefits

Larkspur is grown for its flowers and is a strong pollinator plant - the bumblebees and butterflies pry open the long-spurred blooms for nectar deep inside. The dried flowers hold their color exceptionally well and are a staple of wreath and confetti work. Note: all parts are toxic if eaten, particularly the seeds - this is an ornamental plant only.

⚠️ Toxicity & safety

Toxic - do not eat. All parts, especially the seeds and young growth, contain diterpenoid alkaloids; ingestion can cause numbness, weakness, and in larger amounts paralysis, and can be fatal, particularly to children. Grow as an ornamental only and keep the seeds away from children and pets.