Ah yes. Thanks.

Basically, some of the rock wool has water-repellent coating. It still
holds water via capillary action between the fibers, but not nearly as much
as the regular hydrophilic fibers. I believe the perlite is added to make
it more airy.

My own experience is with LECA products, but I have used some rock wool in
the past. For me, it has some of the same negative attributes of sphagnum
(too easily packed, making it too soppy), but cannot decompose.

--

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"Vestman" wrote in message
k...

"Diana Kulaga" skrev i en meddelelse
rthlink.net...
Hi, Victoria,

What does this "Green Mix" look like?

Diana


It contains a small amount of beads of perlite and mostly of
something like rockwool, but in shredded small balls. It is supposed
to both contain and expel moisture.

Victoria