Flowering Bonsai – Serissa
There are many flowering bonsai species but if you want one with a long flowering time then Serissa is ideal. It is also known as ‘Tree of a thousand stars’.
Small trumpet shaped flower of Serissa
Serissa foetida (or Serissa japonica) produces tiny, white trumpet shaped flowers for long periods of the year. It has small glossy leaves and a twisted and rough trunk. Cultivars with variegated leaves, double or coloured flowers have also been developed.
Its vigorous growth pattern makes it a popular bonsai species. Serissa can be propagated easily by taking softwood cuttings in spring.
Serissa originates from south east Asia and is therefore a subtropical species. It needs to be kept at temperatures of between 12 to 20oC ideally though some suggest it can survive outdoors above 7oC.
In many parts of the world this means that it is an indoor bonsai. But Serissa will benefit from being outdoors in part shade for a period during the summer, provided it is not moved too much. When indoors, Serissa needs good light and should be protected from draughts.
It is important to have a good humid atmosphere for Serissa but do not overwater or stand the pot in water. If spraying, ensure that there is good circulation of air to allow the flowers to dry quickly. Apply a balanced feed every 2 weeks during the growing season and monthly during the winter.
Prune as required to maintain the shape of the tree. Pruning during the summer will result in vigorous growth of shoots.
Repotting and pruning the roots has an unpleasant side effect. Latin scholars will recognise the meaning of ‘foetida’ as foul-smelling. When the bark and roots are cut an obnoxious smell is emitted. Repotting should be carried out every 2 years in the spring.
Sometimes Serissa experiences yellowing and dropping of the leaves and this indicates a problem with the growing conditions e.g. wrong humidity levels or location.
Most styles of bonsai are suitable for Serissa but the formal upright style does not suit the twisted trunk.
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