I'm about to do my second grow very soon and I've got some nutes left over from my last grow. Probably enough to see me through this next one. They are bio bizz nutes. So Organic. They have been open for about 9 months. I've kept them in a box. Will they be OK to use again? Are there any signs I should look out for that will tell me they've gone off etc?
i think the goto test for organic anything is the sniff test. whatever it might smell like it can not smell rotten. i'm confident it has a shelf life but 9 months stored in fair conditions shouldn't be a problem as long as the smell is not unpleasant. just an opinion...