Sabatia kennedyana
Plymouth Rose Gentian · Plymouth Gentian · Large Sabatia
About the plant
What it is and where it grows — not part of any germination protocol.
The plant
- Habit
- Herbaceous perennialPlant Finder
- Habit
- Perennial, Forb/herbPLANTS Database
- Height
- 2.5-3 ftPlant Finder
- Spread
- 2.5-3 ftPlant Finder
- Flower
- Showy; pink and white with a yellow and red eyePlant Finder
- Blooms
- June to AugustPlant Finder
- Native range
- Eastern North AmericaPlant Finder
- Native range
- Canada, lower 48 statesPLANTS Database
- Hardiness zones
- 6-9Plant Finder
- Note
- Sowing at 40 is fatal -- nothing over three cycles. A cold period after germination is fine.Seed Germination Theory and Practice, 2nd ed.
- Note
- A wetland species. Wild populations are threatened by shoreline development and poaching.Plant Finder
Growing conditions
- Sun
- Full sun
- Soil
- Wet, boggy
- Moisture
- Wet
- Watering
- Wet
Toxicity is noted only where a source states it. No note here is not a finding of safety.
Sources: Plant Finder — Missouri Botanical Garden; PLANTS Database — USDA NRCS; Seed Germination Theory and Practice, 2nd ed. — N. C. Deno.
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Moderate
Start around March 1, 2027 for a May 3 last frost.
Warm moist stratification
Temperature: 70°F 21°C
42%, over 2-5 weeks.
Cold moist stratification
Duration: 90 daysTemperature: 40°F 4°C
Deno gives no length for this period; three months is his standard cycle.
Warm moist stratification
Temperature: 70°F 21°C
A further 30%, in 6-8 days.
Steps after step 1 run on after germination.
No stated waiting before sowing. Then 35 days to germinate.
42% germination in 14–35 days.
42% at 70, then 30% more after the cycle. Sow warm: sowing at 40 kills it.
This source doesn't state how long.
Protocol 2
DerivedN. C. Deno, 1993Cold moist stratification
Temperature: 40°F 4°C
Nothing, even after three cycles.
No stated waiting before sowing.
0% germination.
Nothing over three cycles. Deno calls sowing at 40 fatal for this species.
This source doesn't state how long.