Pro Mix expiration date

peebee · February 1, 2015

I know I read about it once here but a search turns up nothing. Pro Mix bales have a date on the side, is this the production date or the expiration date of the active ingredients?
Thanks.

RayR · February 2, 2015

It's a production date. There is no expiration date, ProMix is mainly peat, perlite, a little lime plus a wetting agent. None of that is going to change over time, especially when it's a dry mix. I suppose the wetting agent might degrade a little, but that's no big deal.
If you have the bales with mycorrhizae or mycorrhizae + biofungicide bacteria, there could be some loss of viability of the spores over some years.

kurt · February 2, 2015

I follow thier website since it changes and upgrades from the slow and general info it used to have.Anyway they are going to be in your area at the expo linked below.Their site has a actual contact page nowadays.I sent them your question caus I use the product myself.

http://www.indoorgardenexpo.com/show...o-los-angeles/

peebee · February 2, 2015

Thanks Ray & Kurt. Yes, I meant the mycorrhizae expiration in the bales. I saw bales at Lowes with a 2013 date and wondered about that. I think I'll pass till I see fresher stock.

February 1, 2015	#1
peebee Tomatovillian™ Join Date: Aug 2006 Location: Southern CA Posts: 1,714	Pro Mix expiration date I know I read about it once here but a search turns up nothing. Pro Mix bales have a date on the side, is this the production date or the expiration date of the active ingredients? Thanks.

February 2, 2015	#3
kurt Tomatovillian™ Join Date: Oct 2011 Location: Homestead,Everglades City Fl. Posts: 2,500	I follow thier website since it changes and upgrades from the slow and general info it used to have.Anyway they are going to be in your area at the expo linked below.Their site has a actual contact page nowadays.I sent them your question caus I use the product myself. http://www.indoorgardenexpo.com/show...o-los-angeles/ __________________ KURT

February 2, 2015	#2
RayR Tomatovillian™ Join Date: Jun 2010 Location: Cheektowaga, NY Posts: 2,466	It's a production date. There is no expiration date, ProMix is mainly peat, perlite, a little lime plus a wetting agent. None of that is going to change over time, especially when it's a dry mix. I suppose the wetting agent might degrade a little, but that's no big deal. If you have the bales with mycorrhizae or mycorrhizae + biofungicide bacteria, there could be some loss of viability of the spores over some years.