how much does grass seed weigh
1 On average, plan on spending up to $3.50 per pound of grass seed or around $0.01 per square foot that needs to be covered. 2  It will greatly depend on the type of grass seed you want. 3  For every 1,000 square feet, you will need from two to eight pounds of seed, depending on the blend.n addition, if you have children who love to play outdoors, a lush of green grass provides a cushion against bruises and bumps. Grass provides a great place to play. How much does it cost? 1  On average, plan on spending up to $3.50 per pound of grass seed or around $0.01 per square foot that needs to be covered.