[IAlawn]

Hey!

Newbie here to the lawn forum so apologies if this has been addressed in another post.

I have a half opened bag of urea sitting in my garage from when I winterized the lawn last November. My question is, does urea go bad and lose its effectiveness if its been stored in the garage all year? Or would the bag I have still be ok to use this year? I don't mind buying another bag if I have to, but didn't want to waste what I have left over if it would still as good as when it was bought.

Thanks!

 

[pennstater2005]

If it was stored in a dry, cool place and didn't get wet it's fine. I'm still using urea from over two seasons ago.

 

[gregonfire]

If it was stored in a dry, cool place and didn't get wet it's fine. I'm still using urea from over two seasons ago.

What happens if it gets wet? I had my 50lb bag sitting outside and had a quick rainshower come through. The bag wasn't opened, but it was made of a heavy paper. I didn't open the bag yet, but it seems like it was just the paper part that got wet, not the inside..

 

[pennstater2005]

If it gets wet it will clump together. I've had it happen before to a small portion.

 

[g-man]

Even if it clumps, it still works. You just need to make sure to break the clumps up with a hammer. If you try to use it with clumps, you might end up with a polka dot lawn with the nitrogen burn from the clumps.

 

[pennstater2005]

This article talks about nitrogen losses from urea. It does have a small part about what happens when urea gets wet.

https://www.noble.org/news/publications/ag-news-and-views/2009/may/nitrogen-losses-from-urea/

 

[wardconnor]

Even if it clumps, it still works. You just need to make sure to break the clumps up with a hammer. If you try to use it with clumps, you might end up with a polka dot lawn with the nitrogen burn from the clumps.

This happened to me like 2 weeks ago. It will burn if you do not break them up. I was feeling too lazy and did not break them up and ended up with spots all over. See my youtube video I made about it.

 

[GrassDaddy]

It can also get slimey if its moist enough lol