Species: Forsythia x intermedia

(for-sith'i-ah in-ter-mee'dee-ah)

Forsythia x intermedia

Border Forsythia

Found on Course Walks

Spring Flowering Trees and Shrubs, Zone 6 & 7 Plants plus shrubs

Map of plant locations

(Plant location data may be incomplete)

In Collection(s):

None Listed

Cultivars

This species has many cultivars which vary according to size, form, habit, flower size and shades of yellow flower color.

'Evergold', 'Fiesta', 'Gold Tide', 'Karl Sax', 'Lynwood Gold', 'New Hampshire Gold', 'Northern Sun', 'Spectabile', 'Spring Glory'

Ornamental Characteristics

Size: Shrub 4 to 8 feet, Shrub < 4 feet, Groundcover

Height: 8' - 10' (spread 10' - 12')

Leaves: Deciduous

Shape: mounded, arching

Environmental Characteristics

Light: Full sun

Hardy To Zone: 5b

Soil Ph: Can tolerate acid to alkaline soil (pH 5.0 to 8.0)

Environmental Other: best in full sun to maximize flower

Moisture Tolerance: Consistently moist, well-drained soil; Occasional periods of dry soil
See graphic below

Insect Disease

Phytophthora can be a problem in poorly drained sites

Bare Root Transplanting

Easy

Other

hybrid between F. suspensa and F. viridissima, both of Chinese origin; hybridized in Europe; transplant bare root or B & B; renewal pruning is needed after flowering every few years

Moisture Tolerance Graphic

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Moisture Tolerance

Moisture graphic

Occasionally saturated or very wet soil

Consistently moist, well-drained soil

Occasional periods of dry soil

Prolonged periods of dry soil

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