Use of leonardite in substrate

Azmi

Lifetime Charter Member
Lifetime Member
Jan 24, 2005
1
0
1
Hi Tom,
I've read a few of your previous posts where you mentioned using leonardite in the substrate. As I understand leonardite is derived from coal?? I wonder if you explain a little bit more about leonardite or recommend alternatives. I'm in Singapore and I haven't seen it in the local shops. I haven't found anyone other than yourself talking about it in the local forums.
Thanks.

Azmi
 

Tom Barr

Founder
Staff member
Administrator
Jan 23, 2005
18,696
747
113
Re: Use of leonardite in substrate

It's really old peat, peat is really old plant detritus(mulm). Old leonardite is coal.

It's a carbon source for bacteria that last a very long time, so small amount of Carbon are available, it adds some small amounts of humics as well.

General Hydroponics sells it. Dupla make something like it as well in pellet form.

Regards,
Tom Barr
 
  • Like
Reactions: Ian Chan