The ashwagandha is more suitable for a weakly acidic environment, mycelium can grow in the pH 4.0 to 7.5 range, the optimal pH is 5.5 to 6.5, too acidic or too alkaline are not conducive to the growth and development of ashwagandha. The pH of the culture material decreases gradually with the prolongation of the growth time of the ashwagandha, and when the initial pH is 6.5, it can be reduced to pH 4.0 after 10 days of germination and maintained until the mushroom emergence. Song Airong et al. (1999) measured the fermentation broth and mycelial growth of Ashwagandha under different pH conditions and the same pH conditions. The results showed that the initial pH of Ashwagandha fermentation broth should be pH 8.0, and the pH after mycelial growth was about 5.0. Some people mixed lime within the ashwagandha culture material to prevent stray bacteria, this method is not desirable. Generally not more than 0.5%, the effect of controlling stray bacteria is not ideal, more than 0.5% and will cause harm to the growth of mycelium. Lime is used in production before the discharge of bacteria, all need to isolate the mycelium with 20 centimeters of raw soil below. In the fungus bed found in some people use lime in addition to the fungus, this method makes the medium alkaline to strengthen, resulting in weak mycelium growth, which is tantamount to destructive rescue, so use with caution. Salty alkaline soil is not suitable as mulch, not suitable for underground cultivation using pits and troughs, and not suitable for shallow surface water spraying. Many producers ignore the impact of soil and water pH, resulting in production damage.