Volcanic rocks, that is, rocks ejected during volcanic eruption, came from the ground tens of millions of years ago and are rich in nutrition. Although it looks ugly, it is not an ordinary stone. Its role in life is quite extensive. Now it can be used as stepping stone, health stone, and can also be used as fertilizer to grow orchids.

Method step

There are many tiny pores on volcanic rocks, which can expel moist air. Volcanic rocks themselves are also rich in various trace elements. We can pick up such stones from the mountains, or buy such stones. If you plant orchids, you'd better choose red ones. Soak the prepared volcanic rocks for a day and a night, and then add some garden soil. If the volcanic rock is larger, make it smaller. The diameter of the stone is about three or four millimeters.