Blue Lace Flower

40 Seeds

Seeding Blue Lace Flower (Trachymene coerulea) is a wonderful way to add delicate, airy clusters of lavender-blue flowers to your garden. It's a favorite for cut flower arrangements due to its long vase life and lovely scent, and is sometimes called Didiscus or Didiscus coeruleus.

Here’s how to sow and grow it successfully:

💐 Blue Lace Flower (Trachymene coerulea) – Seeding Guide

📅 When to Sow

Indoors (recommended):

• Start 6–8 weeks before last frost

  • Example: For a May last frost, sow seeds in March

Outdoors (optional):

• Direct sow after the last frost, when soil is 65°F (18°C) or warmer

🌱 How to Sow

Soil & Containers

• Use a light, well-draining seed-starting mix

• Choose pots or trays at least 2–3 inches deep

Sowing Instructions

• Depth: Sow seeds ¼ inch (6 mm) deep

• Spacing: If direct sowing, space seeds 3 inches apart; thin later to 10–12 inches

• Keep soil evenly moist but not soggy

🌡️ Germination

• Temperature: 65–75°F (18–24°C)

• Time: 14–21 days

• Germination can be slow and erratic, so be patient!

🌿 After Germination

• Transplant seedlings once they have 2–3 sets of true leaves

• Handle carefully—Blue Lace Flower dislikes root disturbance

• Harden off for 7–10 days before transplanting outdoors

🌞 Transplanting Outdoors

• Wait until all danger of frost has passed

• Sun: Full sun (6+ hours)

• Soil: Well-drained, neutral to slightly alkaline

• Spacing: 10–12 inches apart

🌸 Blooming

• Blooms in 12–14 weeks from sowing

• Flowering continues mid-summer to frost

• Excellent as a cut flower (lasts up to 10 days in water)

🪴 Growing Tips

• Stake or support if grown in windy areas—plants grow 18–30 inches tall

• Deadhead to extend blooming

• Tolerates some drought but prefers regular watering

🐝 Pollinator Info

• Attracts bees, butterflies, and other beneficial insects

• Fragrant, airy umbels make it a great filler in mixed beds or bouquets