I'm getting geared up for Step # 2 (weed n feed) with my PG Magnum. With the price of fert (& gas) going through the roof I'm thinking about using Bulk Amonuim Sulfate form my local Co-Op. The last time I loked at their prices it was a nice Savings. I realize the convenience isnt has nice compared to bag fert, however if I can save some money Does anyone use 21-0-0 ? Any pros or cons with it? In very late Fall I may use 46-0-0 (urea) however that stuff would "melt" in our humidty Thanks in advance!!!