Old homeowner left this fertilizer....Should I use it?
 

The following two products were left in the shed at the house I bought. The lawn looked really nice when I moved in, but now it has weeds growing in certain areas. (See by other thread)

My questions are.....Should I use these products? When should I use them? Are they still good if they are 1+ year old?

sure
 

yes, those will work fine, fertilizer doesn't really go bad, unless it gets wet. then it is just clumpy and hard to disperse. The NPK ratio seems like a solid season opening blend, but make sure you don't do it when its 75 and hot. if you see a nice little rain on the weather channel, go ahead and spread it out there. it will definitly green up your turf. as for weeds, KILL 'em all. go get a selective herbicide and go at it.
-smallz

Never had a problem
 

I've never had a problem useing old, old very old fertilizer. if you have wells , be sure to use sparingly.