Forsythia Viridissima is also called Greenstem Forsythia. This popular garden forsythia is native to Asia.
This species is a rather tall growing deciduous, forsythia bush that is growing upright.
It can grow up to 3 metres (up to 10 feet) in height and spreads more than 3 metres (more than 10 feet).
Although, this species has variations that grow as dwarf forms (please look them up at the bottom of this page).
This forsythia bush has a similar growth habit as the Weeping Forsythia (Forsythia Suspensa).It has weeping branches and hen the apices of the branches touch the ground, the plant can spread vegetatively by rooting of the stems.
Yet, the leaves are longer and narrower than those of the Forsythia Suspensa. And the flowers grow in cluster (Forsythia Suspensa has solitary flowers.
Tip: Forsythias, unfortunately, do not provide any food for insects. It is wise to also plant some native plants that attract butterflies, flies, bees, bugs and also birds and other wildlife!
F. Viridissima 'Bronxensis' – Dwarf Greenstem Forsythia
This compact shaped shrub grows about 0.5 to 1 metre (2 feet) in height and up to 1 metre (3.3 feet) in width. It has yellow flowers that bloom in April and a bright dark green foliage. The foliage turns to a lovely brown in autumn. It is ideally planted in hedges or solitary in small gardens.
F. Viridissima 'Weber's Bronx'
This is a dwarf forsythia that fits well rock gardens and in any small garden. It only grows about 0.3 to 0.5 metre (1 to 1.6 feet) in height and up to 1 metre (3.3 feet) in width. They yellow flowers bloom in March/April. The foliage is dark green. This little shrub is completely hardy.
F. Viridissima var koreana 'Kumson' – Kumson Greenstem Forsythia
This is a medium-sized shrub that grows about 1.2 to 1.8 metres (4 to 6 feet) in height and spreads up to 2 metres (7 feet) in width. It has an arching growth habit. The flowers are yellow. The foliage is variegated and has a very attractive pattern of silver veins on the dark green leaves.