Helianthemum ledifolium
Spotted Rock Rose
About the plant
What it is and where it grows — not part of any germination protocol.
- Habit
- annualPlants of the World Online
- Flower
- Pale yellowRead from the photograph on this page
- Native range
- Algeria, Bulgaria, Canary Is., Cyprus, East Aegean Is., Egypt and elsewhereGBIF 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 March 29, 2027 for a May 3 last frost.
Warm moist stratification
Temperature: 70°F 21°C
30% germinated here, in 3-7 days.
Cold moist stratification
Temperature: 40°F 4°C
Warm moist stratification
Temperature: 70°F 21°C
Germination happens during step 3, in 7 days.
30% germination in 3–7 days.
This source doesn't state how long steps 1 and 2 last.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Moderate
Start around January 18, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C
16% germinated at 40 itself, in 4-11 weeks.
Warm moist stratification
Temperature: 70°F 21°C
A further 5% after the move.
Germination happens during step 2, in 77 days.
16% germination in 28–77 days.
Half the germination of sowing straight at 70, and months slower.
This source doesn't state how long step 1 lasts.
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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