Low latitude and high altitude mountainous areas belong to subtropical humid monsoon climate. With less sunshine, abundant rainfall and high humidity, it is a suitable area for konjak cultivation.
The underground part of konjac is corm with long root system, which is suitable for growing in light sand soil with deep soil layer, loose texture, good drainage and ventilation, and rich organic matter. The loose and fertile soil is an important condition to ensure the growth and development of konjac root system and the normal expansion of tubers.
The soil pH has a great impact on the yield of konjak. The suitable pH value of most konjak varieties is 6.5 ~ 7.0. Konjak can also be planted in neutral and slightly alkaline soil, but the soil with strong pH is not suitable for the growth of konjak, especially in the soil with strong acid, diseases are more likely to occur when planting konjak. The suitable pH value of konjak flower is 6.5 ~ 7.0, and that of konjak white is 7.0 ~ 7.50.
During the whole development period of konjak, it absorbs more potassium fertilizer, followed by nitrogen fertilizer, less phosphorus fertilizer, and the fertilizer demand is regular: nitrogen: phosphorus: potassium is 6:1:8. Konjak has different needs for nitrogen, phosphorus and potassium at different growth stages. The fertilizer demand is small in the early stage of growth. When konjak changes heads, the fertilizer demand increases, and the tuber expands to the peak of fertilizer demand.
