Ranunculus illyricus
Illyrian Buttercup
About the plant
What it is and where it grows — not part of any germination protocol.
- Toxicity
- Poisonous to cattle, goats, horses. All parts. Protoanemonin. Stated for Ranunculus spp.
Toxicity is noted only where a source states it. No note here is not a finding of safety.
Source: Plants Poisonous to Livestock — Cornell University Department of Animal Science.
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
No stated waiting before sowing. Then 49 days to germinate.
8% germination in 49 days.
The best of three, and that is 8%. Neither light nor GA-3 changed anything.
This source doesn't state how long.
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 sowing. Then 42 days to germinate.
6% germination in 21–42 days.
6% at 70, then 6% more in the cold that follows.
This source doesn't state how long.
Protocol 3
DerivedN. C. Deno, 1993Difficulty Very high
Sow around November 2026 — a date the source gives, not one counted back from a May 3 last frost.
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.
This source doesn't state how long.