As you may recall, bonsai need special special soil. They are picky little guys. Every bonsaist swears by their soil mix. Essentially, you need something that has good drainage. Sounds easy enough! Hahaha, no. It is almost political, the world of bonsai soil. If I was a professional, I would use akadama clay, from Japan, but importing it is very expensive. So, with the powers of the internet, I have found a soil mix that will be my first effort. I may alter it as I see fit. It is 50% NAPA #8822 (diatomaceous earth/rock. Used for oil spills traditionally, but it is just a great water absorber), 25% lava rock, and 25% peat moss. I have to sift the NAPA 8822 vigorously to get rid of all of the dusty, sandy bits. I need a good size granule, about 1/8 to 1/4 inch in diameter. But that is not what we are here for! We are here for lava rock!
You can buy thirty pounds of large lava rocks (1-1.5 inches) for about $5 at Home Depot. Or, you can order small crushed lava rock for about $15 per pound. Hey, I have a hammer and time, no need to spend all that money!
So I set out to crush rock. Early in the fall 2018 semester, I attempted this by running over the rocks with my car until they crumbled. This worked, but very slowly. A hammer was the more efficient way to go.
It really isn’t as complicated as is may sound. Hammer meet rock, rock get small. But, you do have to monitor size control and the amount of force you use. I have lost many a small rock that I wanted to split in half because I pulverized it into dust. But that’s the way it goes. So smash smash!
I have probably spent about 8 hours working on these rocks, and I still am not done. It is laborious, tedious, and hurts my hand and back. But I had the energy to show the process for my lovely and supportive fans as home. Enjoy the thrilling transition from big rock to many small rocks.
After about a dozen rocks, I get this:


Oh, how I care for my babies.
I will transplant most, if not all of my plants into bonsai soil, even though they are still in training and aren’t true bonsai yet. My friends on Reddit say that this will help with growth and root development as a part of the bonsai process. And of course, during the growing season, I fertilize regularly because they are not many nutrients in the soil mix.
Feel free to comments or ask questions! I would love to interact with you guys and share my knowledge.
















