Mother-in-law seedling technology: germination stage: the temperature is 18 ° C -24 ° C, 7-14 days can sprout. The substrate has a low EC value with a pH of 5.8-7.5. Seed germination needs light. Cover with a thin layer of vermiculite after sowing to keep the substrate light and slightly moist, but not too moist. Avoid direct sunlight and proper shading. Cotyledons appear and grow. At this stage, the soil moisture should be appropriately reduced, but it should not be too dry and the temperature should be lowered to 16 °C-18 °C. The EC value of the culture substrate cannot be higher than 0.5. At this stage, the fertilizer can be sprayed, and a balanced nitrogen fertilizer of 50 ppm to 75 ppm is preferred. True leaf growth, developmental stage and refining stage: In these two stages, the material concentration can be increased to 100ppm-150ppm. At the same time, attention should be paid to timely transplanting the upper basin
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