I am a homeowner. I live at 7700 above sea level in a high desert environment. Long cold winters and mild sunny dry summers. I have about 15,000 sq.ft. of automatic sprinklered 5 zone lawn that I maintain each year. I do the following in the spring ( May) • Dethatch • Aerate • Lime ( Type S Mason Lime for Soil. Soil is always acidic in spring) • Fertilize with Scots Turf Builder with Weed Control • In the summer ( july) I apply another round of lime and fertilizer • I sprinkle at night on all 5 zones every other day to start then every 6 days in the hotter times in summer • Late Sept last application of Fertilizer Over the years it seems that Scots is not performing like it used to. In prior years the lawn had a consistent deep green color. I am reaching out to the professionals in this forum for professional advice on changing the fertilizer and where I can get it. I have heard that a NPK ratio of 20-20-20 is best. Scots is a 28-0-3. So no phosphorous and a small amount of potash. So maybe that could be a problem? I would like to also purchase a pallet of the fertilizer to maintain some level of economy rather than purchase at the retail rate at Home Depot, Lowes, etc. Scots is now past 60 per 40 lbs which they say covers 15,000 sq.ft. but for my 15,000 I use 2 bags because the setting Scots specifies on their drop spreader for 15,000 always comes out short and I need to add a second bag. ( so their specs on 15,000 sq.ft. per bag is BS) So another reason I need a better fertilizer. Any suggestions or help is appreciated! Thank You!