Forsythia x intermedia (Border Forsythia)
Botanical Information
| Family | Oleaceae |
| Genus | Forsythia |
| Species | x intermedia |
| Category | Woody |
| Type | Shrub (deciduous) |
| Pronunciation |
Details
| USDA Hardiness Zone | 6 - 8 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 5a - 7a |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H5 - H7 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -34 - (-7) |
| Temperature (°F) | -30 -20 |
| Height | 3 - 4 m |
| Spread | 4 m |
| Growth | Fast |
| Flowering Period | April, May |
Description and Growing Information
| Notable Specimens | The A.M. Cuddy Gardens, Strathroy, Ontario, Canada. |
Photographs
Forsythia x intermedia 'Lynwood'
Forsythia x intermedia 'Northern Gold'
Forsythia x intermedia 'Gold Tide'
Scanning electron microscope image of pollen grain.