Clematis florida ‘Sieboldii’


Clematis florida ‘Sieboldii’ in a 3 litre pot.

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SKU: 195044 Categories: ,


Clematis Florida ‘Sieboldii’, also known as Clematis Florida ‘Sieboldiana’ or ‘Bicolor’, is a lovely plant that is closely related to the Florida Plena or Alba Plena. This cultivar boasts a long blooming period, with flowers appearing from June to October, providing at least five months of color and interest throughout the growing season. For best results, it is recommended to plant Clematis Florida ‘Sieboldii’ in a sunny location in the garden, ideally facing south or west and protected from strong winds. Interestingly, this cultivar has a rare characteristic where its flowers may revert back to the Plena form, resulting in a delightful mix of purple and green flower parts on the same plant or stem. This has been observed since the plant was introduced to the UK from Japan in 1864. Overall, Clematis Florida ‘Sieboldii’ is a hardy and beautiful plant that is a great choice for adding color and interest to a garden or landscape. Its long blooming period and unique characteristics make it a great addition to any garden.

Key Facts

  • Common Name(s):Clematis ‘Sieboldii’
  • Hardiness:Fully hardy through most of the UK
  • How big will I get? Clematis florida ‘Sieboldii’ can grow to a height of 2.5m and a spread of 1m.
  • Did You Know That:The name clematis comes from the Greek word “klema,” meaning climbing plant?

Plant Calendar

A rough guide to how this plant will change through the year.

Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Flowering Time
Foliage Colour

Care Guide

Soil Requirements

Clematis florida ‘Sieboldii’ prefers moist but well-draining soil. This plant is not tolerant of acidic soil, it requires either a neutral or alkaline soil to grow.

Best Position

Clematis florida ‘Sieboldii’ prefers a sheltered position and requires full sun to thrive, this consists of more than six hours of direct sunshine per day.


Clematis florida ‘Sieboldii’is a repeat flowering clematis, flowering once at the start of Summer on previous years growth, and then again later in Summer on fresh growth. Therefore ideally it should be pruned twice, once in early Spring and then again after the first flush of flowers. When pruned in early Spring, you should aim to keep a strong framework of old growth, which will produce the first flush of flowers, however cut back some stems to the top pair of healthy buds, this is done to promote fresh growth. After the early Summer flowers, you should cut back all flowered stems to a bud or strong side shoot.

Pest, Diseases and Wildlife

Clematis florida ‘Sieboldii’ can have problems with aphids, snails and caterpillars., it can be vulnerable to certain diseases such as clematis wilt. It is toxic to cats, dogs and horses.

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