Organic Lawn Fertilizer

My soil was only half
Remember: water has a strange and powerful attraction to itself. It would much rather stick to itself than disperse through the soil.
One last point about watering deeply: If your topsoil is only two inches deep, laying down an inch of water is a bad idea. An inch of water is good for watering 12 inches of soil. Further, an inch of water will effectively carry a lot of soil nutrients down deeper. So if your soil is only two inches deep, this rinses away a lot of your soil nutrients! So deep watering should be done only in conjunction with deep soil.
My soil was only half an inch deep. Even weeds had a tough time growing. Below my half inch of soil was huge river rocks seperated by smaller rocks, sperated by sand. It bore no resemblance to soil. I added four inches of topsoil. This was done with two dumptruck loads at $100 a pop. It covered all of the weeds with enough soil that they could not work through - I could start from scratch with my grass seed of choice!
18 inches or more soil would be optimal. I have a friend that has soil this deep. While everyone else waters a dozen times or more over the summer, she waters just once or twice. She uses no fertilizer or pesticides. She has thick, dark green, weed-free grass which requires frequent mowing. Her lawn is about as “no-brainer” as you could get.