this is my second year in the lawn biz and i foresee more overseeding this year. i live in NJ which is in zone 6 (i believe). when my customers ask for grass seed, how do i know what to sow? i don't know how to look at a lawn and determine what type of grass it is, so how do i know what seed to use? i heard somewhere that a blend of kentucky bluegrass, perennial ryegrass, and fescue works best in my area. how do u guys go about this? i know that certain types of grasses stand up better to different situations such as high foot traffic, etc., but do u guys actually ask the customers about their lifestyle to determine what grass seed to use, or do you just use the same blend (or non-blend) for each house.