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Kumson Forsythia

Forsythia viridissima 'Kumson'

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Kumson Forsythia (Forsythia viridissima 'Kumson') at Oakland Nurseries Inc

Kumson Forsythia in bloom

Kumson Forsythia in bloom

(Photo courtesy of NetPS Plant Finder)

Kumson Forsythia (Forsythia viridissima 'Kumson') at Oakland Nurseries Inc

Kumson Forsythia foliage

Kumson Forsythia foliage

(Photo courtesy of NetPS Plant Finder)

Height:  6 feet

Spread:  6 feet

Sunlight:  full sun 

Hardiness Zone:  4b

Other Names:  Greenstem Forsythia


Unusual and striking network of white veins on dark green foliage make this shrub a rarity; dazzling gold flowers smother the branches in early spring ahead of the leaves

Ornamental Features

Kumson Forsythia is draped in stunning gold bell-shaped flowers along the branches in early spring before the leaves. The flowers are excellent for cutting. It has white-spotted dark green foliage. The pointy leaves do not develop any appreciable fall color.

Landscape Attributes

Kumson Forsythia is a multi-stemmed deciduous shrub with an upright spreading habit of growth. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

This is a relatively low maintenance shrub, and should only be pruned after flowering to avoid removing any of the current season's flowers. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. It has no significant negative characteristics.

Kumson Forsythia is recommended for the following landscape applications;

  • Mass Planting
  • Hedges/Screening
  • General Garden Use

Planting & Growing

Kumson Forsythia will grow to be about 6 feet tall at maturity, with a spread of 6 feet. It has a low canopy, and is suitable for planting under power lines. It grows at a fast rate, and under ideal conditions can be expected to live for 40 years or more.

This shrub should only be grown in full sunlight. It is very adaptable to both dry and moist locations, and should do just fine under average home landscape conditions. It is not particular as to soil type or pH, and is able to handle environmental salt. It is highly tolerant of urban pollution and will even thrive in inner city environments. This is a selected variety of a species not originally from North America.

Hardiness Zone Plant Height Minimum Sunlight
Massing  Screening  Garden 
Ornamental Features
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