I graded, amended with compost and org. fert., tilled, and seeded TTTF in September- 3 weeks later all looked great. 3 more weeks,and the entire amended area was very yellowed. The perimeter where less compost was added was beautiful, lush green. Soil test showed pH 7.5, everything in balance except a little high in S. I did not add too much compost or over-fert. !!!! Any ideas? All of my other seeded installs look great. Not sure where to proceed from here.