Volcanic rock itself is rich in selenium, which is helpful for the plant's root system by stimulating cellular activity in the plant and increasing the rate of cell division. In addition, volcanic rock helps succulents to root and germinate during planting, and is also effective in nurturing other types of granular soil.
McFaddenite is also a natural mineral, and when properly mixed with soil can supplement the minerals needed for plant growth. However, you need to pay attention to the ratio of soil to mafanshi when using mafanshi, as the root system of plants can be easily burned if the ratio is not appropriate.
In summary, volcanic rock mixed with soil is more favorable to the growth of woody plants, but the use of mafic rock also need to pay attention to the proportion of soil and mafic rock, in order to avoid burning the plant's root system.