But don't leave the carrots in too long...they'll get moldy.

Were this a great ammount and worth the risk, I'd say to rehydrate it and see (under a strong magnigying glass or cheap pocket microscope) if anything starts growing or smells off. Otherwise, it's a big risk for a bonghit or two.
Best not to share it or give it to another without warning 'em first.
On the up side...if it has any seeds, they should still be viable. :thumbsup: