Hi all. I was just curious how long you guys think granular fertilizer can be stored before it loses its potency? Usually it's cheaper to buy the larger bags, but if its shelf life is limited to just a few months or something then I'd probably be better off buying it in smaller quantities as I need it. It's not the weed-and-feed or other mixed products. Just regular 10-10-10 fertilizer.

I'm also looking for ideas on the best ways to store it? We have a lot of plastic kitty litter buckets and ice cream buckets, but I'm not sure how airtight they really are. It would have to stay in our garage, so I think keeping the humidity out would be the biggest issue.