The latest planting time of mint

Peppermint is widely distributed in temperate regions of the northern hemisphere. It is cultivated in various parts of China. It is born in mountains, wetlands and rivers, and its roots grow underground at an altitude of 2100 meters. But it can also grow at an altitude of 3500 meters. It is an aromatic crop with special economic value. Let's take a look at the growth habits and planting time of peppermint.

Growth habits of peppermint

1. Temperature: peppermint has strong adaptability to temperature, its rhizome survives the winter and can withstand-15 ℃ low temperature. The optimum temperature for its growth is 25 ℃-30 ℃. The growth was slow when the temperature was below 15 ℃ and accelerated when the temperature was higher than 20 ℃. At 20 ℃-30 ℃, as long as water and fertilizer are suitable, the higher the temperature, the faster the growth.

2. Light: peppermint is a long-day crop, which is sexually fond of sunlight. Long sunshine can promote the flowering of peppermint and is conducive to the accumulation of peppermint oil and menthol.

3. Soil: peppermint is not very strict on soil, except for over-sand, over-sticky, over-pH and low-lying soil with poor drainage, the general soil can be planted, and sandy loam and alluvial soil are better. The suitable pH value of soil is 6-7.5.

Planting time of mint

The planting time of peppermint is mainly determined by local climatic conditions. Guangdong, Hainan and other provinces can be cultivated all the year round, Jiangsu and Zhejiang around the "Qingming Festival". When the temperature picks up, Rain Water often has high humidity and is easy to survive after planting. In southwest China, planting is best when the rainy season begins. Open field cultivation and protected field cultivation can be adopted in North China and Northeast China. Once planted, it can be harvested continuously for 2-3 years.

Propagation methods of peppermint

1. Split propagation: after the Valley Rain Festival, the seedlings should be replenished when the mint seedlings are about 15 cm high, and the seedlings can be transplanted separately.

2. Cutting propagation: from May to June, the aboveground stem branches were cut into 10 cm long cuttings, and the seedlings were raised by cutting according to the row spacing of 7 cm × 3 cm on the whole seedling bed. After the cuttings took root and sprouted, they were transplanted to the field for cultivation. A large number of seedlings can be obtained by this method.

3. Rhizome propagation

① seed root cultivation: in late April or late August, plants with strong growth and free of diseases and insect pests were selected as mother plants in the field, and planted according to the row spacing of 20 cm × 10 cm. After the aboveground stems and leaves were harvested in early winter, the roots and stems were left in place for planting, and 1 mu of planting could be used for transplanting 7 mu in the field.

② transplanting method: from late October to early spring mint rhizome before germination, early spring soil thawing after planting should be early rather than late, early planting early sprouting, long growth period, high yield. When planting, dig up the rhizome, select the white, sturdy, short Internode and disease-free rhizome as the seed root, cut it into small segments 7-10 cm long, then press the row spacing 25 cm on the finished border surface, open a ditch 10 cm deep, and place the seed root obliquely in the ditch every 15 cm wide, cover fine soil, stampede, and water. It takes about 100 kilograms of seed root per mu. It can also be planted according to row spacing of 25 cm and plant spacing of 15 cm.