Does fertilizer "Go Bad"?

[Schweinhund]

A friend gave me a 50lb. bag of Scott's Turf Builder for free. It was a ripped open bag and would not close completey, but I kept it in my shed so it stayed dry. I applied it to my St. Augustine lawn about 2 weeks ago, watered as recommended, but everything is still brownish yellow and nasty looking.

My question is - since it was exposed to air, does this reduce its potency in any way? Its humid around here, so I'm pretty sure a little moisture got in there. Does this matter and if so, should I refertilize?

[gsxr1100]

With the RH so high, is it a block of fert?

[poolboy]

From what I understand, it will. Plus, stop using Scotts, you're in Houston....
http://www.ktrh.com/pages/gardenline-lawn.html

http://www.ktrh.com/pages/gardenline.html

Make sure you check out the archive page.

[Whitey4]

Fert has a great shelf life.... unless it got wet enough to turn into bricks, it should be fine. The Scotts straight fert is actually a pretty good fertilizer, just apply it at half the recommended rate. The combo products are a problem.... cut the rate, and the AI is not sufficient to control either creabgrass, weeds, etc. The Scotts fert is good... just too much N in it.