Propagation: Starting seeds for 2013, Part 2, 1 by guygee

guygee wrote:
Pam - Two very good questions there, thank you for asking. I had to go and get the bag and look it up to accurately answer your question on grade. The vermiculite I have is packaged by WR Grace & Co. The product is described as "FPSV-2", which is "Fine Particle Size Vermiculite, Particle Size #2". The particle size cumulative distribution was in some product literature I found, so I attached the image. It shows a fairly linear distribution between roughly 40-200 microns, so it varies but relatively fine.

As to the salt, I have not noticed problems but I have not tested it either. Please do not laugh, but I actually just put some in my mouth to see *if* I could taste salt ... no it did not taste salty. A much better test would be to wash the vermiculite with water then boil the water down to see what remained. or boil it down to concentrate the wash then test for salt. I may try this in a controlled way and report back at some point just to be sure.

(Edit for grammar)

This message was edited Mar 22, 2013 4:14 AM