ORIGINAL: beaverdamva
I have a farm in Virginia and get my fertilizer and lime from my Southern States Co-op.
I looked and they have a Northeast partner called Agway and Agway has dealers on Long Island. You could try their web site.
http://www.agway.com
i actually went to an agway near me looking for it last summer. when i got there they had nothing left b/c they were switching to an equine supply store. i should check other ones though.
as for home depot, if it is that cheap i could just do that. i thought it was more costly than that but heck if it is only $2.50/bag its worth it.