Leaf tree.
Alias: Australian chestnut, chestnut bean tree, black bean tree and lucky tree.
Origin: Australia
Morphological characteristics: tall evergreen trees, green Acer truncatum maple up to 30 meters, odd-shaped once.
Pinnate compound leaves, oblong leaflets, subopposite, about 8- 15 cm long, entire,
Leather is shiny. Panicles are born on branches and have small orange flowers, which bloom in spring and summer.
The fruit is 250 cm long and has 1-5 seeds, which are shaped like chestnuts and as big as eggs.
It can also be baked. Because the seed coat is black, it is also called black bean tree.
Habit: Green ingot likes warm and humid, likes fat, and is afraid of drought. It requires a well-ventilated, cool and semi-cloudy environment. The optimum growth temperature is 10~33 degrees, and it should be placed indoors with good scattered light in summer. Green ingot is cold-resistant, which will cause defoliation below 4℃ and overwinter above 5℃ in winter.
Sowing: Generally, seeds can be sown and propagated, but seeds are not resistant to storage, so they should be sown with the harvest. After germination, the seed coat is peeled off and two thick cotyledons turn green due to photosynthesis. Because the cotyledons of the green ingot are very large and symmetrical in two semicircles, they look like ingots, so they are also called green ingots. Because two thick cotyledons can carry out photosynthesis, they can keep a long viewing time.
Cultivation and maintenance: young green ingot plants are suitable for small potted plants and indoor viewing; After growing, it can be used as a garden ornamental plant (it will be cultivated indoors in large pots in the north). In the process of growth, it is necessary to pick the core of the plant and keep the perfect plant type. In order to prolong the viewing time of green ingots, it can be applied to places with cold and semi-shady tips. During the growing period, we should master the principle of "seeing dry and seeing wet" and apply alum fertilizer water once a month. It needs medium-intensity scattered light, which can shade in summer and avoid sun exposure. In summer in the north, the air is dry, so we should always spray water on leaves and plants, but avoid water in the basin to avoid cotyledons rotting. Keep the pot soil slightly dry in winter, and do it without watering to prevent the roots from rotting.
Soil: use fertile sandy loam rich in humus, mix soaked sawdust and small pieces of pine bark, and spread gravel on the bottom of the basin to facilitate drainage.
Pests and diseases: sometimes there are scale insects.