Onosma stellulata
Starflower · Golden Drop
About the plant
What it is and where it grows — not part of any germination protocol.
- Habit
- perennialPlants of the World Online
- Flower
- YellowRead from the photograph on this page
- Native range
- NW. Balkan Pen.GBIF Backbone Taxonomy
Toxicity is noted only where a source states it. No note here is not a finding of safety.
Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Low
Start around January 25, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C
Germination happens during step 1, in 70 days.
100% germination in 56–70 days.
Every seed of eight. Sow it cold and wait two months.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Moderate
Start around November 10, 2026 for a May 3 last frost.
Warm moist stratification
Duration: 90 daysTemperature: 70°F 21°C
One seed of seven, on the sixth day. Deno gives no length for this period; three months is his standard cycle.
Cold moist stratification
Temperature: 40°F 4°C
Five of seven, in the eighth week.
about 3 months from start to step 2. Germination happens during step 2, in 56 days.
71% germination in 56 days.
One seed comes up warm, five more in the cold that follows. Simply sowing cold does better.
How each step is done, in Deno’s words, and what Verified and Derived mean.
Germination trials
Readers’ own records of sowing this species, published after review. Share your trial · All trials
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