Why stems and leaves turn yellow easily in Tianmen winter

Tianmendong, (Latin name: Asparagus cochinchinensis (Lour) Merr), alias: three hundred sticks, Wuzhu, Sidong, tiger tail root, asparagus, tomorrow winter. Tianmen winter root spindle-shaped, leafy branches generally every 3 clusters, light green axillary flowers, berries red when ripe, for Liliaceae, Tianmeng perennial herbs.

Distributed in East China, South-Central China, Hebei, Henan, Shaanxi, Shanxi, Gansu, Sichuan, Taiwan, Guizhou and other provinces and regions. Most of them grow in shady wetlands on the edge of mountain forests, shrubs in hills or grass on hillsides. Generally dig in autumn and winter, wash, remove fibrous roots, boil or steam to the heart, remove the skin while hot, wash, dry and set aside. In addition, the root tuber of Tianmendong is a commonly used traditional Chinese medicine, so it also has high medicinal value.

Morphological characteristics

Tianmen winter climbing plants. The roots are fusiform in the middle or near the end, most of which are 3-5 cm long and 1-2 cm thick. Stems smooth, often curved or twisted, up to 1-2 m long, branched angulate or narrowly winged.

Leafy branches usually clustered every 3, flattened or slightly sharply trigonous due to keel of midrib, slightly falcate, 0.5-8 cm long and ca. 1-2 mm wide; scalelike leaves on stems extend into hard spines 2.5-3.5 mm long, thorns on branches shorter or inconspicuous.

Flowers usually axillary, light green per 2; pedicels 2-6 mm long, joints generally located in the middle, sometimes changing position; male flowers: perianth 2.5-3 mm long; filaments not Adnate to perianth segments; female flowers similar in size to male flowers. Berries 6-7 mm in diameter, red when ripe, with 1 seed. Flowering from May to June and fruiting from August to October

Tianmeng, Liliaceae. Also known as Tiandong. Cold, sweet, slightly bitter. It has the effect of nourishing yin and clearing heat, moistening the lung and nourishing the kidney. It is used to treat fever due to yin deficiency, cough and hematemesis, pulmonary carbuncle, sore throat, thirst, constipation and other diseases. The causes of stem and leaf yellowing in Tianmen winter are as follows:

1. Lack of nutrition. Tianmen winter root growth is fast and developed, long-term do not change the basin to change the soil, will lead to the tuber root knot crowded, lack of nutrients for absorption and utilization, resulting in leaves yellowing.

2. Improper fertilization. If unmature organic fertilizer is applied during the growth period, it is easy to burn roots and cause scorched and withered leaves. For this reason, it is necessary to apply fully mature liquid fertilizer, which is suitable for thin fertilizer, small amount and frequent application.

3. The light is too strong. If you put it in direct sunlight in summer, it is very easy to cause stem and leaf withering and yellowing.

4. Lack of light. If you put it in a place with insufficient indoor light or outdoor shade for a long time, it is also easy to cause the stems and leaves to turn yellow. In order to make it thrive, in addition to the summer need to put shade, other seasons should be given appropriate light.