Forsythia suspensa
Weeping Forsythia · Golden Bell Tree
About the plant
What it is and where it grows — not part of any germination protocol.
The plant
- Habit
- Deciduous shrubPlant Finder
- Habit
- Perennial, ShrubPLANTS Database
- Height
- 6-10 ftPlant Finder
- Height
- 6.0 ftPLANTS Database
- Spread
- 6-10 ftPlant Finder
- Flower
- Showy; yellowPlant Finder
- Flower
- YellowPLANTS Database
- Blooms
- March to AprilPlant Finder
- Blooms
- Early SpringPLANTS Database
- Native range
- ChinaPlant Finder
- Hardiness zones
- 5-8Plant Finder
Growing conditions
- Sun
- Full sun to part shadePlant Finder
- Sun
- Shade tolerance: HighPLANTS Database
- 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.
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Moderate
Start around March 15, 2027 for a May 3 last frost.
Warm moist stratification
Temperature: 70°F 21°C
10% germinated at 70 before the cold period.
Cold moist stratification
Temperature: 40°F 4°C
Warm moist stratification
Temperature: 70°F 21°C
A further 20% after the cold period.
No stated waiting before sowing. Germination time not stated; 21 days assumed.
10% germination.
A tenth comes up before the cold period and a fifth more after it.
This source doesn't state how long.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Moderate
Start around March 15, 2027 for a May 3 last frost.
Cold moist stratification
Temperature: 40°F 4°C
Warm moist stratification
Temperature: 70°F 21°C
No stated waiting before sowing. Germination time not stated; 21 days assumed.
10% germination.
This source doesn't state how long.