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Outstanding Features:
Noted for its very early, yellow spring bloom.
Description:
Height: 8-10'
Width: 8-10'
Hardiness Zone: 3b for Meadowlark, Northern Gold, Northern Sun and
Vermont Sun.
Forsythia are large shrubs that are well
known for the masses of clear yellow flowers that cover the plant
and provide a spectacular display. They are the first very showy
woody plant to flower in spring. Forsythias are very rapid growers
and can get quite overgrown if not given occasional renewal pruning.
The form tends to be upright spreading, with some shoots heading
up and others arching over, leading to a somewhat unkempt appearance.
Foliage turns reddish purple in fall on some cultivars and yellow
on others.
Requirements and Culture:
Plant in a sunny location. Although they tolerate
light shade, they do not flower profusely in shady sites. Needs
renewal pruning to maintain a better plant form and to produce the
maximum number of flowers.
Limitations:
No serious pests. Most species and cultivars of Forsythia have limited
flower bud hardiness. Choose only the more hardy cultivars for use
in the upper midwest.
Selected Cultivars:
'Northern Sun', 'Meadowlark',
and 'Northern Gold' are all hybrids between Forsythia europaea and
Forsythia ovata. They are quite large in size and are the most cold
hardy.
'Vermont Sun'- is a cultivar
of Forsythia mandshurica. It is more upright in plant habit, blooms
slightly earlier, and has larger flowers than the preceeding cultivars.
Its hardiness is about equal to those listed above.
'Sunrise'- has a good, compact
plant habit maturing at 5-6 ft. in height and spread. Its midwinter
flower bud hardiness is comparable to the above but it hardens slightly
later in the fall and is more frequently injured during early winters.
It rarely flowers satisfactorily in zone 3b.
Photo Credit: 1,
2 & 3 MLA. Photo 1 is 'Vermont Sun', 2 & 3 are 'Northern
Sun'.
Minnesota Power | University of Minnesota | Northern
States Power Company
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