Planting Methods and Technical Points for Isodon serra

Isodon serra is a perennial herbaceous plant. It is not a major Chinese medicinal herb, but rather a folk herbal medicine, also known as "tu huanglian" (native coptis). It is generally used to treat acute icteric hepatitis, acute cholecystitis, dysentery, enteritis, and so on, and it also helps to invigorate blood circulation and remove blood stasis. So how do you grow Isodon serra? Today let's take a look at its planting methods.

1. Soil and Fertilizer Preparation

Wild Isodon serra generally grows on hillsides, in fields, beside footpaths, along ditch edges, and by small streams. It is a plant that loves light and moisture but fears waterlogging, so the planting site is generally chosen as sandy loam with convenient drainage and irrigation, relatively fertile soil, and soil that does not easily become compacted. Heavy clay or overly sandy soil is not suitable for planting. Prepare the land carefully, apply a generous amount of base fertilizer, and dig good drainage ditches for drainage and water diversion.

2. Propagation Methods

There are three ways to propagate Isodon serra: seed propagation, cutting propagation, and division propagation. Seed propagation is generally timed for spring when rainfall is plentiful, or in autumn when the fruit ripens; it is mainly done by drilling or dibbling. Before sowing, the seeds need to be mixed with fine river sand; after sowing, they need watering and covering with rice straw to keep them warm and moist. For cutting propagation, select high-quality branches, cut them into small sections about twelve or thirteen cm long, and soak them in rooting powder to increase the survival rate of the cuttings. Division propagation uses the old roots from the previous crop to grow new shoots, which are then used for transplanting.

3. Reasonable Close Planting

Since Isodon serra will keep propagating during its subsequent growth, the planting density becomes very important. To maximize benefits, we need to ensure both the yield and the quality of Isodon serra. Generally, we plant at a row spacing of twenty to twenty-five cm and a plant spacing of fifteen to twenty cm.

4. Field Management

After Isodon serra is planted and survives, which takes about ten days, it will grow new roots. During this period we should fertilize several times, mainly by watering on urea or manure and urine water. After half a month, apply manure and urine water once more, and in the later growth process, fertilize generally once every half month. After transplanting, water twice a day and cover with plastic film to keep warm and moist. After rain, drain water promptly to prevent waterlogging from compacting the soil. Finally, carry out three to four rounds of intertillage and weeding each year to keep the soil loose and reduce nutrient consumption.

5. Pest and Disease Control

Isodon serra was originally a wild weed, so its vitality and resistance are very strong. Throughout its growth, pests and diseases rarely occur, but powdery mildew and aphids sometimes appear. For powdery mildew, we can spray carbendazim or triadimefon powder, generally once about every week, and two to three times is enough for it to recover. For aphids, we can use "yakèxīng" to spray and kill them; of course, trichlorfon crystals are also very effective.

Isodon serra is generally used whole as medicine. When planting it, we should use as little pesticide as possible to avoid toxins remaining in the plant. That is all the content I want to share with you today, and I hope it is helpful to you.