greetings, i live in central indiana (zone 5) and have about 10,000 sq.ft. of turf (50-50 mix of kentucky bluegrass and perennial rye). as a homeowner, i do as most do-it-yourselfers and purchase Scott's "best" lawn pro, 4 step fertilizer program. in the spring, i apply step 1 (preM) and continue to follow the application instructions as well as the schedule directed by Scott's. the lawn is really pretty nice (only 1-2 years old) and is clearly head and shoulders above others in the neighborhood. i am meticulous in maintaining a beautiful lawn...mowing at the recommended heights (i keep it longer than most) ..sharp blades...different directions...broadleaf weed control (redzone)...annual core aeration, etc. etc. i try to do all the right things and even installed a sprinkling (irrigation) system that was the cadillac of all systems. this year, so far, i haven't needed to use it much due to plenty of rain which should be good for the lawn. when i do use the system, the watering is done by the book. my problem is, i'm just not satisfied with the results i'm getting with Scott's. seems my lawn could be much greener, more lush, and healthier. the blades of grass (tips) seem to be white in color...or even a bit brown looking. i also have several spots (1' diameter) that look as though the grass is dead, brown, etc. i suppose it could be pet urine but i don't own a pet and it's awfully peculiar when the spots are throughout the lawn as opposed to being near dog walkers traffic areas. oh well, just a thought. my question is...what can i do to take my lawn to a new level????? i want it perfect. scott's "best" 4 step program isn't gettin it done. can i use better products??? what about applying fertilizer in-between my scott's applications (6-8 weeks between aps). can i supplement my "feedings' by using more fertilizer in-between". i'm not afraid to throw the water to the lawn if that's what it takes. HELP!!!!! what about a soil sample??? when would i do it (at what stage of fertilization)??? i wanted to do a core aeration in the fall followed by topdressing but i'm just not comfortable being able to obtain a good quality mixture (compost-topsoil-sand-peat)...and not comfy i could find an easy way to spread it. besides, that would have to be done in september and i want results now!!!!!!!!!!!!!!!!! thanks for the feedback.