Larix kaempferi
Japanese Larch
About the plant
What it is and where it grows — not part of any germination protocol.
The plant
- Habit
- TreePlant Finder
- Habit
- Perennial, TreePLANTS Database
- Height
- 70-90 ftPlant Finder
- Height
- 98.0 ftPLANTS Database
- Spread
- 25-40 ftPlant Finder
- Flower
- RedPLANTS Database
- Blooms
- Non-floweringPlant Finder
- Blooms
- SpringPLANTS Database
- Native range
- JapanPlant Finder
- Native range
- CanadaPLANTS Database
- Hardiness zones
- 4-7Plant Finder
- Note
- Deno's counts include the empty seed coats, so filled seed does considerably better.Seed Germination Theory and Practice, 2nd ed.
- Note
- A deciduous conifer with good autumn colour. Intolerant of full shade.Plant Finder
Growing conditions
- Sun
- Full sunPlant Finder
- Sun
- Shade tolerance: HighPLANTS Database
- Soil
- Rich, moist, acidic, well-drainedPlant Finder
- Moisture
- Moisture use: MediumPLANTS Database
- Watering
- MediumPlant Finder
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 High
Start around February 8, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C
No stated waiting before sowing. Then 56 days to germinate.
20% germination in 42–56 days.
Cold beats warm here, and dry storage changed nothing either way.
This source doesn't state how long.
Protocol 2
DerivedN. C. Deno, 1993Difficulty High
Start around January 25, 2027 for a May 3 last frost.
Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing. Then 70 days to germinate.
14% germination in 14–70 days.
Deno counted empty coats as seed, so the figure on filled seed is much higher.