no you can start seeding now and they will stay doormant for upto two months, but as the ground warms, they will start to germinate and the grass will start to grow ready for mid/late spring........It looks really nice and all those lovely nutrients you have added is going to promote a lot of growth. Is it not a bit early for seeding as I thought you need a ground temperature of over 10 degrees? I have a lot of bare patches that a visiting dog created in my lawn that I am itching to repair but have been holding off for warmer weather.