Slow release fertilizer is what you want!

The season to fertilize your lawn is upon us, don't forget to use a slow release!

It is tempting to use a fast release so that your lawn will green up and pop quick...but that provides little to no long term benefit for your lawn. The root system is the foundation of your lawn, and a slow release is going to give your lawn a stronger, healthier root system.

Slow release does cost more, but they last 6-8 weeks as opposed to 2-4 of a fast release.
Check your bag, read your label, and make sure you get a slow release!