Ranunculus gramineus
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.
The plant
- Note
- GA-3 killed the seed outright here, which is the opposite of its effect on R. lyallii.
Toxicity is noted only where a source states it. No note here is not a finding of safety.
Sources: Plants Poisonous to Livestock — Cornell University Department of Animal Science; Seed Germination Theory and Practice, 2nd ed. — N. C. Deno.
This source reports 4 treatments. All are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Low
Start around November 17, 2026 for a May 3 last frost.
Warm moist stratification
Duration: 90 daysTemperature: 70°F 21°C
Deno gives no length for this period; three months is his standard cycle.
Cold moist stratification
Temperature: 40°F 4°C Light: either
60%, over 3-7 weeks.
about 3 months from start to sowing. Then 49 days to germinate.
60% germination in 21–49 days.
The shortest route to the best figure. Light makes no difference either way.
This source doesn't state how long.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Low
Start around January 11, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C Light: either
58%, over 6-12 weeks.
Warm moist stratification
Duration: 90 daysTemperature: 70°F 21°C
A further 9%, in 4-12 days. Deno gives no length for this period; three months is his standard cycle.
Cold moist stratification
Temperature: 40°F 4°C
A last 7%.
Steps after step 1 run on after germination.
No stated waiting before sowing. Then 84 days to germinate.
58% germination in 42–84 days.
58% in the cold itself, then 9% and 7% over the two cycles after.
This source doesn't state how long.
Protocol 3
DerivedN. C. Deno, 1993Difficulty Moderate
Start around March 15, 2027 for a May 3 last frost.
Sow outdoors and leave it
Up in late April and May.
No stated waiting before sowing. Germination time not stated; 21 days assumed.
30% germination.
Half what the bench gives, for none of the work.
This source doesn't state how long.
Protocol 4
DerivedN. C. Deno, 1993Gibberellic acid soak
Seeds treated with GA-3 were killed.
Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing.
0% germination.
GA-3 does not merely fail here -- it kills the seed outright.