University of Illinois Extension
University of Illinois Extension - Selecting Shrubs for Your Home
http://www.urbanext.uiuc.edu/shrubselector
Border Forsythia
Forsythia x intermedia
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Forsythia x intermedia flowers
Size:

Small
Size: medium
Medium

Large
Exposure/ Light Requirements:
Full Shade not required.
Full Shade
Full Sun required.
Full Sun
Partial Sun/Shade not required.
Partial Sun/Shade
Hardiness Zone: 4 - 8 
Mature Height: 8-10 Feet
Mature Width: 10-12 Feet
Features: Bright yellow flowers in spring; autumn color is green with a tinge of purple (mild interest only).
Culture: Full sun; well-drained soils; tolerates alkaline soil and air pollution.
Cultivars:
  • 'Lynnwood' ('Lynnwood Gold')- very showy plant with the bright yellow flowers held erect on upright branches.
Mature Form: Irregular, due to a mix of upright and arching stems.
Native To: Of hybrid origin
Soil Conditions:
Dry
Soil condition: Moist, Well-DrainedMoist, Well-Drained
Wet
Tolerance:
Tolerance: Alkaline SoilAlkaline Soil
Dry Sites
Salt
Soil Compaction
Wet Sites
Tolerance: WindWind
Uses:
Barrier
Use for: Border.Border
Foundation
Hedge
Use for: Massing.Massing
Naturalizing
Screen
Use for: Specimen.Specimen
Foliage Color: Green
 
Fall Foliage Color: Green
Purple
 
Additional Notes:

Forsythia hybrids: various species of forsythia have been crossed to produce hybrids that are more cold hardy. These include the following:

  • 'Happy Centennial'- 2 1/2 feet tall, flowers heavily, flower buds are cold hardy.
  • 'Meadowlark'- 6 to 9 feet tall, flowers heavily, flower buds cold hardy, arching branches.
  • 'New Hampshire Gold'- 5 feet tall, deep yellow flowers, flower buds are cold hardy.
  • 'Northern Gold'- 6 to 8 feet tall, flower buds are cold hardy, upright habit.