Sometimes called woodland peony, it grows wild in China, Korea, Japan, Far Eastern Russia and Sakhalin. Karl Maximovich first described it in 1859, from a specimen collected in the Amur region.Wikipedia: Paeonia obovata
This source reports three treatments. All are shown.
Protocol 1
DerivedN. C. Deno, 1993
Difficulty HighRated by us, not by the source.
Start around June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 2026.
1
Dry storage
Deno says only "DS seed" -- no period and no temperature.
2
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
3
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
4
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
One seed of three.
5
Cold moist stratification
Temperature: 40°F 4°C
One more of three.
about 9 months from start to step 5. Germination happens during step 5; time not stated, 21 days assumed.
33% germination.
One seed of three, twice over, across four cycles. Deno reports this under P. vernalis, which is this same species.
This source doesn't state how long step 1 lasts.
Protocol 2
DerivedN. C. Deno, 1993
Difficulty ModerateRated by us, not by the source.
1
Warm moist stratification
Duration: 60 days · Temperature: 70°F 21°C
The radicle and its branching root system form here. This is what Deno counts as germination.
2
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
3
Warm moist stratification
Temperature: 70°F 21°C
The single true leaf forms only now. Germination is hypogeal.
about 5 months from start to step 3. Germination happens during step 3.
Deno lists it as germinating at 70 like P. officinalis, and gives no figures for it.
This source doesn't state how long step 3 lasts.
Protocol 3
DerivedN. C. Deno, 1993
1
Dry storage
Deno says only "DS seed" -- no period and no temperature.
2
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
3
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
4
Cold moist stratification
Temperature: 40°F 4°C
Nothing at all.
about 6 months from start to step 4. Germination happens during step 4.
0% germination.
Nothing over three cycles started cold. Deno reports this under P. vernalis, which is this same species.
This source doesn't state how long steps 1 and 4 last.