Forsythia x intermedia Information

Forsythia x intermedia, commonly known as Border Forsythia or Golden Bell, is a hybrid of two Forsythia species: Forsythia suspensa and Forsythia viridissima. It is a deciduous shrub that is widely cultivated for its beautiful yellow flowers that appear in early spring.

Here are some key features and information about Forsythia x intermedia:

  • Size and growth: Border Forsythia grows up to 8-10 feet tall and wide. It has a fast growth rate and can reach its full size in 5-7 years.
  • Leaves: The leaves of Forsythia x intermedia are dark green and oval-shaped, and they are arranged alternately along the stem. They grow up to 3 inches long.
  • Flowers: The flowers are the main attraction of Border Forsythia. They are bright yellow, bell-shaped, and appear in clusters along the stems before the leaves emerge in early spring. Each flower is about 1 inch long and has four petals.
  • Fruit: After flowering, Border Forsythia produces small, brownish fruit capsules that contain numerous small seeds.
  • Growing conditions: Forsythia x intermedia prefers full sun to partial shade and well-drained soil. It is relatively tolerant of drought and pollution. It is hardy in USDA zones 5-8.
  • Landscape use: Border Forsythia is commonly used in mass plantings, as a hedge or screen, or as a specimen plant. Its bright yellow flowers add a splash of color to the landscape in early spring.
  • Pruning: Forsythia x intermedia blooms on old wood, so pruning should be done immediately after flowering to avoid removing the flower buds for next year's blooms.
  • Pests and diseases: Border Forsythia is generally disease-free and not prone to pests, but it may be affected by leaf spot, canker, and twig blight in some cases.

Overall, Forsythia x intermedia is a beautiful and easy-to-grow shrub that adds color and interest to the landscape in early spring.