Ranunculus illyricus
Illyrian Buttercup
About the plant
What it is and where it grows — not part of any germination protocol.
Safety
- Toxicity
- Poisonous to cattle, goats, horses. All parts. Protoanemonin. Stated for Ranunculus spp.Plants Poisonous to Livestock
The plant
- Habit
- tuberous geophytePlants of the World Online
- Flower
- YellowWikipedia
- Native range
- Albania, Austria, Belarus, Bulgaria, Central European Russia, Czechia-Slovakia 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; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility; Plants Poisonous to Livestock — Cornell University Department of Animal Science.
Worth knowing
- A protected plant in Hungary, growing in pastures and grasslands. It is covered in white hairs, and its yellow flowers open in May and June. Wikipedia: Ranunculus illyricus
This source reports three treatments. All are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty High
Start around February 15, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C Light: either
Germination happens during step 1, in 49 days.
8% germination in 49 days.
The best of three, and that is 8%. Neither light nor GA-3 changed anything.
Protocol 2
DerivedN. C. Deno, 1993Difficulty High
Start around November 24, 2026 for a May 3 last frost.
Warm moist stratification
Duration: 90 daysTemperature: 70°F 21°C Light: either
6%, over 3-6 weeks. Deno gives no length for this period; three months is his standard cycle.
Cold moist stratification
Temperature: 40°F 4°C
A further 6%.
about 3 months from start to step 2. Germination happens during step 2, in 42 days.
6% germination in 21–42 days.
6% at 70, then 6% more in the cold that follows.
Protocol 3
DerivedN. C. Deno, 1993Difficulty Very high
Sow around November 2027 — a date the source gives, not one counted back from a May 3 last frost. Too late for spring 2027 — that needed starting on November 2026.
Sow outdoors and leave it
Placed outdoors in November; one up in April.
No stated waiting before sowing. Then 150 days to germinate.
4% germination in 150 days.
One seed of twenty-six. Outdoors is the worst of the three routes.
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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