Is refrigeration necessary for Greg Watson fertilizers?

[jhj]

I just got my ferts and was ready to make solutions. I know that plantex CSM+B solution should be refrigerated, but what about the rest: KNO3, KH2PO4 and K2SO4?

Thanks

[djlen]

The only one I refrigerate is the Plantex, after mixing with water for dosing.

But I dose all the others try so I don't have to worry about them. None of the nutrients need to be refrigerated when in a dry state.

Len