Zinnia belongs to the family Asteraceae, the millenia genus, also known as white AI, jade hibiscus, hibiscus. It is a perennial evergreen sub-shrub, widely cultivated in the middle and lower reaches of the Yangtze River, especially in Shanghai and Jiangsu. It is often used for potting or making bonsai. It is suitable for balcony, indoor and garden viewing. The leaves are lightly touched by hand, and the aroma is attacking people. It is like Aixiang, and it is like wild chrysanthemum, which makes people cool and comfortable, refreshing and refreshing.

The gerbera plant is 60~120 cm high, and the leaves are tightly clustered on the top of the branch. The narrow ovate wedge shape is 2~3 cm long and 0.3~0.5 cm wide. The apex is oval, the leaf base is wedge-shaped, and there is no serration. The leaf is silver. Gray pubescent. The head flower is nearly spherical, golden yellow, 4~5 mm in diameter, and is born in the upper leaf axils. The flowering period is from August to September. Xiangju looks like silver leaf chrysanthemum, but the leaves are more delicate and fragrant. It is a specialty flower of Huai'an City, Jiangsu Province.

Xiangju is native to south and south of China. It is warm and humid, with a suitable temperature of 15~25°C, heat resistance and good growth at 35°C. More cold-resistant, winter temperature is about 0 °C, the middle and lower reaches of the Yangtze River should be wintering in the cold room, after the frost falls into the house, Qingming to Guyu out of the house. Xiangju Xiguang, spring, autumn and winter grow under full sunlight, the daily light is not less than 6 hours, Xiangju is a short-day plant, and the summer heat is slightly shady. It should be grown in loose, fertile and well-drained sandy loam soil. The soil acidity and alkalinity requirements are not strict, and it grows well at pH 6~7.5. Hi dampness, rainy season to prevent sputum drainage, to prevent stagnant water from dying. Xiangju Xifei, in the growing season to be thin and diligent.

Plant morphology:

Hibiscus, erect, branched shrubs, 10 to 40 cm high. Leaves alternate, tightly gathered at the top of the branches, narrowly ovate-shaped, 2–3 cm long, densely grayish-white pubescent, apically 3--5-lobed or divided, base sate long, lobate ovate or narrowly oblong. Flower heads subglobose, 4–5 mm in diam., borne in upper leaf axils, stalked, into a terminal, leafy raceme; floral sessile; sessately sessate Split; middle bisexual, tubular, 5 short. Achenes have angular edges 5, and the crowns are short, split scales. Flowering spring. It is cultivated in the south and south of China.

Germination began in early April, and the rapid growth period of new shoots from early May to mid June was inhibited by high temperature growth in summer and secondary growth in autumn, but the growth was not as large as spring. The shoots have strong germination ability, are resistant to pruning, and the branches are soft and easy to shape.

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