What are the growing conditions for gromwell? A detailed guide to the latest cultivation requirements
Gromwell (Lithospermum) is a perennial herbaceous plant of the Boraginaceae family, and its roots are rich in purple substances, making it one of the many traditional Chinese medicinal herbs. Gromwell has the effects of cooling the blood, invigorating blood circulation, and clearing heat and detoxifying, and it is clinically often used to treat symptoms such as warm macules, damp-heat jaundice, and heat constipation. So what requirements does gromwell have for growing conditions? Below let us learn together about the growing conditions of gromwell.
1. Soil
Gromwell is fairly adaptable to the environment, because it is cultivated in most regions of our country. However, gromwell has characteristics such as cold tolerance, fear of high temperatures, fear of water accumulation, and fear of waterlogging, so when choosing a planting site we need to take its growth habits into consideration. Generally, a site with higher terrain and relatively dry conditions, with deep soil rich in humus, and with drainage and irrigation is chosen; sandy loam, calcareous loam, or clay soil are all acceptable.
2. Temperature
Gromwell seeds have strict requirements for temperature for both germination and growth. Generally speaking, gromwell cultivation involves a dormant period, so for the seeds to germinate the dormant period must be broken, and breaking the dormant period requires placing them in an environment at around minus one degree for twenty-four hours. Next, the best temperature for seed germination is between 13 and 17 degrees, at which the seed germination rate is relatively high. Of course, there are also special varieties; for example, Xinjiang gromwell does not have very strict temperature requirements and can sprout well under conditions of 15 to 30 degrees.
3. Humidity
For gromwell seeds to germinate or for gromwell plants to grow, the water requirements are also extremely high. Generally speaking, when gromwell seeds are sprouting, the humidity in the soil is best at around 20 percent; the moisture should not be too much, otherwise it will cause the seeds to rot and mold, damaging the growth structure of the seeds. Next, gromwell is a plant that fears water, so in the later growth process the field moisture must also be strictly controlled, especially during the rainy season, when drainage should be timely, and at the same time it must be ensured that there is no water accumulation in the field. During normal growth, the humidity in the soil must not exceed 40 percent, otherwise it easily causes root rot, which has a serious impact on the yield and quality of gromwell.
4. Nutrients
Gromwell has a relatively large demand for nutrients, so the nutrient content in the soil must be sufficient. Before planting, we need to improve the soil structure and fertility through fertilization. During the seedling stage of gromwell growth, we mainly use nitrogen fertilizer combined with phosphorus and potassium fertilizers; in the later stage, fertilization is done with urine and cake fertilizer, and the final topdressing is done with barnyard manure and phosphate fertilizer; at least three topdressings per year must be ensured.
The above is the editor's understanding of the growing conditions of gromwell. In fact, when planting gromwell, the first thing we should consider is the growing conditions of gromwell. If the growing conditions are all suitable, then the subsequent planting work can be carried out.