What kind of ecological environment does Codonopsis pilosula need to grow?

One-year-old Codonopsis pilosula seedlings are trailing and rarely flower. Plants more than two years old are twining and generally flower. During the growing period, it has strong adaptability to the environment. Wild Codonopsis pilosula is distributed vertically at altitudes of 1400-2100 m, growing in zones with half shade and half sun or on shady slopes, with a slope of about 15°-20°. Codonopsis pilosula is a deep-rooted plant, suitable for growing in deep, loose, well-drained sandy loam rich in humus. The soil pH should preferably be neutral or slightly acidic, generally with a pH value between 5.5 and 7.5. Codonopsis pilosula prefers a mild, cool climate, is afraid of heat, and is relatively cold-tolerant. Codonopsis pilosula is not very strict about water requirements; it can grow normally under conditions of annual precipitation of 500-1200 mm and an average relative humidity of about 70%. Codonopsis pilosula has relatively strict light requirements: seedlings prefer shade, while mature plants prefer light.