What are the environmental requirements for growing Gastrodia elata? A detailed guide to cultivation techniques
I have never worked with Gastrodia elata, and now I want to grow it, but what are its environmental requirements? I would like friends to share a thing or two. The most critical factor in growing Gastrodia elata is temperature, followed by humidity; its need for sunlight is actually the smallest. Below is a detailed introduction to the growing environment requirements of Gastrodia elata for your reference (if you...
I have never worked with Gastrodia elata, and now I want to grow it, but what are its environmental requirements? I would like friends to share a thing or twoThe most critical factor in growing Gastrodia elata is temperature, followed by humidity; its need for sunlight is actually the smallest. Below is a detailed introduction to the growing environment requirements of Gastrodia elata for your reference (if you have better techniques, you can send them to Zhongdiwang and we will compile them for everyone to learn together)
Temperature is the primary factor affecting the growth of Gastrodia elata. Gastrodia elata prefers to grow in an environment that is cool in summer and not too cold in winter. It is fairly sensitive to temperature, and the level of temperature directly affects its growth, yield and quality.
For Gastrodia elata to grow from a tiny "mi ma" tuber to a "jian ma" tuber, the required effective accumulated temperature is about 3800°C, and at around 4000°C its marketability is even better. Generally speaking, when the soil temperature reaches above 12°C, the cells of Gastrodia elata begin to become active and can start digesting and absorbing Armillaria mellea as nutrients for their own growth and enlargement; as the temperature rises, their vitality increases. When the soil temperature reaches 20-25°C, this is the optimum temperature for the growth of both Gastrodia elata and Armillaria mellea, and at this time Gastrodia elata grows and develops fastest. But when the soil temperature continues to rise above 30°C, the growth of both Armillaria mellea and Gastrodia elata is instead inhibited, and "aconite-shaped" jian ma tubers are easily produced.
Therefore, in hot seasons attention must be paid to heat prevention and cooling. When the air temperature is below 15°C, the growth rate of Gastrodia elata slows down and gradually stalls as it enters overwintering dormancy. Gastrodia elata is relatively cold-tolerant; as long as the temperature of the soil layer it is in is above -4°C, it can overwinter normally, but if it is below -5°C, the tubers of Gastrodia elata will suffer frost damage and rot, affecting their safe overwintering.
Seed-purpose Gastrodia elata (seed tubers) need a certain period of low-temperature dormancy in winter in order to sprout normally the following spring. Under low-temperature conditions of 2-5°C, the seed tubers need about two months to pass through the dormancy period. If the low-temperature period is insufficient, even if the sprouting conditions are suitable, the seed tubers will not stir or sprout. After the seed tubers break dormancy, the speed of sprouting is also related to the low-temperature conditions received during dormancy: the longer the low-temperature treatment, the faster the sprouting speed, and vice versa, the slower.
Wild Gastrodia elata is generally distributed in areas with annual precipitation above 1000 mm, relative air humidity of about 80%, and soil moisture content of 50-55%.
Continuous overcast and rainy, wet and humid climatic conditions are most suitable for the growth of Gastrodia elata, especially in the peak growing season from June to August, when nutrient accumulation in Gastrodia elata reaches its peak and more water is needed. Abundant rainfall during this period is the key to ensuring a high yield of Gastrodia elata. By September, nutrient accumulation in Gastrodia elata enters its late stage and reaches physiological maturity; at this time soil moisture should be controlled below 40%. If there is too much rain, Armillaria mellea grows vigorously, invades the new tubers, and decomposes the tissues of Gastrodia elata as nutrients, causing the tubers to rot and leading to reduced yield or lower quality.
Because Gastrodia elata is a non-green plant, the entire asexual reproduction process from planting to harvest takes place underground, so light has no direct effect on the growth and reproduction of the underground tubers, and can only indirectly affect changes in soil temperature.
If Gastrodia elata is cultivated in a cool region, increasing exposure to direct light can raise the soil temperature. After Gastrodia elata bolts and emerges from the soil (about two months), it needs a certain amount of scattered light, but it dislikes strong light; intense direct light can cause sunscald, damage the stems of Gastrodia elata, and easily lead to plant death. At the same time, direct sunlight increases the evaporation of soil moisture, lowers soil humidity, and affects tuber growth.
Therefore, at this time attention should be paid to building a shed for shade to reduce exposure to direct light. Strong wind is harmful only to Gastrodia elata that has bolted and is flowering; it can break or blow down the flower stalks and affect seed yield. Therefore, after emergence the flower stalks should be protected from strong wind, for example by staking the emerged flower stalks.
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