What are the temperature requirements of Gastrodia elata?

Temperature is an important factor affecting the growth and development of Gastrodia elata, and temperature is not only affected by season, but also affected by latitude and altitude. Generally speaking, the latitude increases by 10 °, the average temperature decreases by 0.5 ℃, the altitude increases by 1000 meters, and the climate decreases by about 6.5 ℃. Therefore, most of the wild Gastrodia elata grows in mountainous areas and has the ecophysical properties of cool and moist. In the process of artificial cultivation, we found that when the temperature of the planting layer rose above 10 ℃, the terminal buds of Gastrodia elata began to sprout and grow; when the temperature rose above 20 ℃, the growth of Gastrodia elata was rapid; when it reached 30 ℃, the growth of Gastrodia elata was inhibited; if it reached 34 ℃ and high temperature persisted, it would lead to rot and decrease yield of Gastrodia elata; when the temperature of planting layer dropped below 10 ℃, Gastrodia elata stopped growing and entered dormancy. Gastrodia elata is relatively cold-resistant and can safely survive the winter in-3 Murray 4 ℃. When the temperature dropped below-5 ℃, Gastrodia elata appeared frost injury. However, in the high mountain areas where the temperature changes gently, there will be no frost damage even if the temperature drops below-5 ℃. However, in the low mountain areas where the temperature rises and falls greatly, even if the planting layer is less than-5 ℃, Gastrodia elata will often die from frost injury. Therefore, in the process of cultivating Gastrodia elata in low mountainous areas and plain areas, attention must be paid to the manual control of temperature and temperature difference.