Menards has Milorganite 5-2-0 36lbs fertilizer on sale for $5.99 with additional 11% rebate bringing the price down to $ 5.33 AR plux tax:
Additionally, you can PM this to Home Depot or Lowes and get another 10% off due to their 110% PM policy and won't need to wait for rebate either.
Milorganite fertilizer helps promote the healthy growth of lawns, trees, shrubs, flowers, and vegetables. The non-burning organic nitrogen feeds up to 10 weeks and the iron delivers a long-lasting green. The slow-release formula helps reduce mowing, conserve water, and is non-leaching. Trust the fertilizer that has been proven effective for over 90 years.
No need to water in
High Iron for enhanced greening
Feeds 8-10 weeks