May 4, 2018 · Pumice, Lava, scoria are some of the terms used to describe inorganic substances of volcanic origin. They vary by density, color, element composition, vesicle size, water retention capacity. If you want to go through the technical information just google the " CANLAVA" website.

Dec 4, 2014 · Pumice and scoria are differentiated by density alone - pumice is less dense than water and scoria is more dense. They are both volcanic glass (no or very few minerals). Scoria tends to be more common with more mafic (higher iron and magnesium) volcanoes, but other than that and the density, they are quite similar.

Feb 28, 2025 · The Idaho pumice is much whiter than the pumice I purchased from Bonsai Jack a couple years ago (and whiter than the pumice I purchased locally when I lived in Seattle). The Idaho pumice is also 10% heavier, but that could be due to the aggregate size of the Idaho pumice being smaller and more uniform, and therefore there are smaller air pockets.

Jul 28, 2009 · Pumice is much lighter and less porous than lava is and is only available in a white/grayish color. Lava is heavier by nature and is more porous than what pumice is. Lava comes in many sizes and I find what works best for me on large and small trees alike is …

Aug 10, 2020 · Clearly, pumice holds more water than the other two. Lava and leca are close, and have more air filled porosity. So if your pots are not holding enough water, add more pumice to the mix. If your pots are staying wet too long, add more lava to the mix. Leca is a pretty good material, more like lava than pumice in water holding and air holding ...

May 4, 2020 · When I lived on the West Coast, I truly used garbage can loads of pumice. However, after years of experimenting, my best results were never with 100% pumice. (1) First, piece size was important. I was careful to sift all my pumice, toss the fines, and keep the small pieces for smaller bonsai or small trees in development.

Jul 3, 2019 · Pumice is very light. The lava is heavier and helps provide stability. It’s easy to accidentally wash lava out of the pot when watering if you use a coarse spray of water. Using lava minimizes this problem. But, sure, trees grow well in pumice. Straight pumice is the preferred “soil” for newly collected yamadori.

Jan 22, 2022 · The color is very muted and the particle size is nicely aligned with Akadama, Kanuma, and Kiryu particles. A lot of US pumice can be very white and obnoxious at times. The US particle sizes are variable so I wind up with pumice particles too big or too small compared to the akadama particles even when screening.

Jun 22, 2014 · I have been reading a lot here about akadama, Turface MVP, and pumice. Lots of opinions have been expressed. About a year ago I put equal volumes of each material in separate plastic jars and put them under my deck in the shade in central Oregon. I opened them today, June 21, 2014. Photos are attached; akadama, pumice, turface in order left to ...

Dec 8, 2020 · But that makes sense. Marbles don't hold water. I rescued (really rescued, not like the dead Scots pine) a boxwood with 100% pumice transplant. What I used was sharp (sorta) The local source for it dried up. I guess I'll get some of that roundy hyuga.