Has anyone used Growstone as their inorganic soil medium?

I'd really like to get a bag and give it a whirl. Made of recycled glass. It's ridiculously light in weight compared to something like Soil Perfector. Would be a lot easier on the back when moving around larger bonsai.

I use it, it's a bit large, about 1/2" 10-15mm. Good for large material in tubs or grow boxes. Like pumice, it's glass, but recycled instead of volcanic. Doesn't float away either.
If enough bonsai types wrote the company they might make a smaller size.

Bruce Winter wrote:I use it, it's a bit large, about 1/2" 10-15mm. Good for large material in tubs or grow boxes. Like pumice, it's glass, but recycled instead of volcanic. Doesn't float away either.
If enough bonsai types wrote the company they might make a smaller size.

I'm fairly certain that their "Super Soil Aerator" is within the normal bonsai soil size range.

Al Keppler is trying it out.
Tona

PeacefulAres wrote:

Bruce Winter wrote:I use it, it's a bit large, about 1/2" 10-15mm. Good for large material in tubs or grow boxes. Like pumice, it's glass, but recycled instead of volcanic. Doesn't float away either.
If enough bonsai types wrote the company they might make a smaller size.

I'm fairly certain that their "Super Soil Aerator" is within the normal bonsai soil size range.

Nope, like I said, it's larger.

I'm intrigued. Here's hoping I can find a local vendor.

I can't really speak on the size. Chase Rosade had a bag. Seemed to be a fair size, but I know he screens everything. I typically use unscreened Soil Perfector and know it was smaller and significantly lighter than that.

Call your local hydroponic supply store.
Growstone has a novel method suggestion for screening: Cut holes in bottom of bag and pour water in.

Bruce Winter wrote:Call your local hydroponic supply store.
Growstone has a novel method suggestion for screening: Cut holes in bottom of bag and pour water in.

I second this suggestion.
When inquiring at a local hydroponic store if they carried lava rock, they offered me free samples of growstone at various sizes. It's very light.

Thanks for the suggestion. I'll follow up with some pics showing grain sizes once I acquire a bag.