key growing information

Growing Didiscus From Seed

How to grow didiscus (blue lace flower) from seed: direct sowing with seed covered, succession planting, why to avoid transplanting, soil and cutting stage.

By Hensley’s Seed Co. September 3, 2026

Didiscus - Key Growing Information

Three light-colored varieties of foamy, lacy didiscus flowers.

DAYS TO GERMINATION:

Allow 14–21 days at 70–72°F (21–22°C).

SOWING:

Sowing in place is recommended, after the last frost; cover the seed, since darkness helps it germinate. For transplants, sow 4–6 weeks before the last frost. Plant again every 2–3 weeks from spring into summer. Transplanting works, but the plants dislike root disturbance, so direct sowing gives the best results.

LIGHT PREFERENCE:

Full sun to partial shade.

PLANT HEIGHT:

Grows about 24–36" tall.

PLANT SPACING:

Space plants 6–12" apart.

HARDINESS ZONES:

Grown as an annual.

STEM LENGTH:

12-24".

VASE LIFE:

About 8–10 days.

HARVEST:

Cut when half the flowers in the umbel are open.

SOIL REQUIREMENTS:

Sandy soil that drains well.

USES:

Cut flowers, borders and cutting beds.

SCIENTIFIC NAME:

Trachymene coerulea