If anyone can lend me a hand, it will be appreciated. Yeah, I know the numbers pertain to to available nitrogen, avalilable phosphate, and soluble potash, but why are there so many different blends available? One supplier alone, Lesco, has 369 different fertilizer products listed on its web site, and there must be dozens of firms that market lawn fertilizer. Why there are so many choices really baffles me. I started out to buy some today but got lost on the way. I was thinking of 18-24-12 because someone had mentioned that was appropriate as "starter" fertilizer and to be applied when seeding. But Lesco has no less than 9 item numbers identified as 18-24-12 on its web site and, ironically, none specify that it should be used for starting a lawn. But just focusing on 2 of those 9, the following info is what was provided. Item 500097 - 18-24-12 *W* 50%PPSCU SOP/MOP $23.06 per 50# bag Item 500397 - 18-24-12 50%PPSCU SOP *W* $6.20 per 50# bag Does anyone know what the difference is, other than that one costs almost 4 times as much as the other. Notice that the item numbers are very similar. Home Depot also sells a Lesco 18-24-12 (about $18 fior 50#) which is identified as "Starter" fertilizer and it has an item number 052405, but that number doesn't show up on Lesco's web site, so I guess Lesco makes even more products that it sells through it's own distributors. Another comparison -- Scotts has a slightly under 50# bag of starter fertilizer (29-27-5) for about $32. So my question is, will I get about the same results if I use the $6.20 stuff? And if not, what should I look out for.