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Cut flowers1 variety
Didiscus
Trachymene coeruleaTender annual with airy, lace-like umbels on slender stems for fresh bouquets. The pale blue, 2-2 1/2" blooms are held aloft on stiff stems and have a mild, clean fragrance and a delicate appearance. The plant is upright and branching, with few leaves. Didiscus does not transplant well and typically continues producing blossoms for about 2 months. Also known as 'Blue Lace Flower.'
Days to maturity
95–100 daysDays to germ.
14–21 daysSpacing
6–12 inHeight
24–36 inSun
Sun,Partial ShadeVase life
8–10 daysHow we grow it
Germination
- Days to germ.
- 14–21 d
- Soil temp
- 70–72 °F
- Depth
- 0.125 in
- Light for germ
- dark
Culture
- Days to maturity
- 95–100 d
- Spacing
- 6–12 in
- Height
- 24–36 in
- Sun
- Sun,Partial Shade
- Frost
- tender
- Sow indoors
- No
- Outdoor / direct
- Yes
Harvest
- Cut stage
- Harvest when 1/2 of the flowers on the umbel have opened.
- Vase life
- 8–10 d
- Notes
- Stems are typically between 12 and 24 inches long.
Timing · Zone 5a
JanFebMarAprMayJunJulAugSepOctNovDec
Outdoor / directMay 21 – Jun 18
Bloom (from outdoor)Aug 23 – Sep 27
Windows are anchored to an average last frost of May 21 (1 year in 10 as early as Apr 29, as late as Jun 2) and an average first frost of Sep 18 (1 year in 10 as early as Sep 6, as late as Oct 8). In a late or early year, slide them with it.
Compare in the calendarTrials
Every Didiscus sowingSeed sources, counts, ratings, and the observations kept against each one.Didiscus trials- Suits
- SuccessionSuccession sow spring through summer.
- Cut-and-Come-Again