Yeah, I get mine from Lowe's. The sooner your get it on at this point the better! I usually do mine Mid-march. It stops the weeds from germinating so it's better early. I would get it on ASAP and water pretty good to get it to dissolve. At this point you might get a few weeds still this year, but not nearly as much without it. I have spread it in Feb before a big snow and it worked then too. It's just pellets you spread on the mulch, rock, grass, etc. 16 pound containers cost about 25 bucks at Lowe's and last me 2 years. And I apply about twice the recommended dosage because I hate pulling weeds.

http://www.lowes.com/pd_252817-68859-2463800___?productId=3028440&pl=1&Ntt=preen