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Forsythia (Forsynthia) Forsythia x intermedia

Forsythia - Forsythia x intermedia
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This fast growing, hardy, early blooming shrub signal the arrival of spring.

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Zones 5 - 8 Zones 5 - 8
Hardiness Zones 5 - 8
The Forsythia (Forsynthia) can be expected to grow in the zones shown in color in the arborday.org zone map. View Map
Flowering Tree Flowering Tree
Type of tree
Flowering Trees, Ornamental Trees, Shrubs
8' - 10' High 8' - 10' High
Mature Height
The Forsythia (Forsynthia) grows to be 8' - 10' feet in height.
10' - 12' Spread 10' - 12' Spread
Mature Spread
The Forsythia (Forsynthia) has a spread of about 10' - 12' at full maturity.
Fast Growth Fast Growth
Growth Rate
This tree grows at a fast growth rate. More about this.
Full Sun Full Sun
Sun
This Forsythia (Forsynthia) does well in full sun, partial shade.
Various Soils Various Soils
Soil
The Forsythia (Forsynthia) grows in acidic, alkaline, loamy, moist, rich, sandy, silty loam, well drained, wide range soils.
Rounded Shape Rounded Shape
Shape
This Forsythia (Forsynthia) has rounded shape.
Attributes

The leaves are opposite, simple, coarsely toothed along the upper one-half, margin, ovate-oblong to oblong-lanceoate, 3"-5" long, half as wide, medium to dark green in summer, green to yellow-green in fall.

Description

The forsythia is a hardy, deciduous, shrub with an irregular or rank-growing upright or arching habit. Forsythias should be given enough room to spread without topping the branches for part of their beauty lies in the graceful manner in which the branches grow. Its yellow flowers bloom early in the spring before the leaves appear. Late spring freezes may injure the buds reducing flower quality. The leaves are medium to dark green in summer turning green to yellow-green with an occasional tinge of burgundy in the fall. The forsythia tolerates a wide range of soils except permanently wet or exceptionally dry soil. The forsythia will flower best in full sun to partial shade. After a period of time, the forsythia will need pruning and moderate maintenance. Forsythias bloom on wood grown in the previous year. For this reason, pruning should be done in the spring immediately after flowering. The flower buds develop during the summer and fall, and fall pruning will remove them. However, if the buds are already formed, necessary pruning can be done 4-6 weeks before flowering time, and the pruned branches can be forced indoors. Pruning should follow the natural habit of the shrub removing old or dead wood. Cutting the older branches to the ground every year will cause new shoots to grow from the roots and renew the shrub. If the shrub is completely cut down to ground level, it will come back but will take 2-3 years to flower fully. For hedges, plant forsythia 4-6 feet apart.

History/Lore/Use

The forsythia is named after the English horticulturist William Forsythe. It is also called the border forsythia or golden bell. Forsythia intermedia is a hybrid between F suspensa and F. viridissima. Many cultivars have been selected from this cross including dwarf and compact forms.

Leaves

The leaves are opposite, simple, coarsely toothed along the upper one-half, margin, ovate-oblong to oblong-lanceoate, 3"-5" long, half as wide, medium to dark green in summer, green to yellow-green in fall.

Flower Color

Pale to deep yellow, bell shaped flowers, borne 1-6 together on last year's growth.

Bloom Time

early spring before the leaves appear.