Page 192 - Tài liệu cây cảnh Bonsai4me Bonsai Basics

Spring.

Pests and Diseases Aphids, leaf spot, scale insects, leaf miners, thrips, wilt.
Styling Informal upright forms with single or multiple trunks in all sizes.

Olea/ Olive Bonsai

Olea Europaea is a tender evergreen that thrives in warm subtropical areas,
growing to 10metres in height. It has opposite leathery, shiny, narrow dark-green
leaves up to 6cm long. Small white flowers in the summer are followed by green
olives which given a long enough period of warmth ripen to black. O. Europaea
has light-grey bark which becomes particularly gnarled with age. This is a
broad-leaved species that lends itself well to areas of deadwood.
Bonsai cultivation notes
Position Full sun. Though able to withstand temperatures to 0°C in its
natural habitat, as a bonsai it should not be exposed to temperatures below 7°C.
In frost-prone zones Olives are grown indoors, however to retain the health and
vigour of the tree, placement outdoors from May until September is
recommended.

Feeding Fortnightly from Spring to Autumn, do not feed during the Winter.
Repotting Every second year in Spring. Use a free draining mix.
Pruning Pinch back new growth regularly
Propagation Sow seed at 13-15°C in Spring, semi-ripe cuttings in summer.
Pests and diseases None other than scale insects.
Styles Suitable for all styles except broom and for all sizes.

Sageretia theezans/ Chinese Bird Plum Bonsai

Sageretia are tender shrubs native to Asia and warmer areas of North
America. Extensively grown in China for use as bonsai, Sageretia are evergreen
in milder climates but become deciduous in temperate zones when exposed to
the cold of winter. Sageretia will survive temperatures just below freezing but it

is highly recommended to keep them in conditions that rarely drop below around
10°C to keep them in continual growth. For most parts of Europe and North
America this means growing Sageretia indoors from around September to May.
Sageretia have symmetrically arranged shiny, oval mid-green leaves to
1.5cm long, young growth is reddish in colour before it matures. The bark
quickly becomes scaly and is a dark-brown in colour. In Summer tiny flowers
appear in the leaf axils of new shoots and produce large clusters of white