It may be Winter, spring, summer or fall but that should not stop you from getting your lawn ready for a thick rich lawn. Soil preparation is critical. Making sure you read the label on the bag of seed. Keeping all your receipts just in case you do everything perfect and have to over seed with a different seed. I suggest talking to your local farm store and doing tons of research on the internet. I use YouTube and many other sites such as my weather reports, Farmers Almanac, the department of Agriculture and other pros in growing and seeing as well as cutting maintaining, aeration, mowing, fertilization, watering and shade vs sunny areas. The area you live on also matters. Rainfall and tall vs smaller fescue grasses. Please leave you comments on what tips you can share.