Last fall (early September) I slit seeded (50% Kentucky Bluegrass, 30% Rye and 20% Creeping fescue) a very nice lawn in the Chicago area. One month after slit seeding I noticed that the lawn had large blotchy spots of different colored grass patches growing. All of the grass blades look great, no diseases, no grubs, no thatch, etc. Now this spring, the lawn looks terrible! Most of the lawn is a nice deep green color, however there are large areas of ulgy bright lime green grass. I fertilized the whole lawn with a broadcast spreader (no striping). Other lawns that I have slit seeded last fall turned out great this spring. HELP, I just don't get it. My supplier does know either. I cannot post the pictures because the photo file size it too large. If anyone wants me to email them some pictures, send me your email address.