We recommend using a soil analysis test kit or taking a sample of your soil to your local cooperative extension so your soil can be analyzed to determine what nutrients your soil is lacking. The healthiest, hardiest lawns are fertilized 4 times per year, fall, summer, early spring and late spring but what’s needed can vary throughout the year. So if the Andersons 24 - 5 - 11 Fertilizer is what your lawn needs throughout the year it could be applied up to 4 times per year as long as you do not go over the max rate stated on the label but typically you would apply during the growing seasons only and use other fertilizers other times. We actually have a great guide that can explain how to select the best fertilizer for your lawn.
We recommend using a soil analysis test kit or taking a sample of your soil to your local cooperative extension so your soil can be analyzed to determine what nutrients your soil is lacking. The healthiest, hardiest lawns are fertilized 2-4 times per year, fall, summer, early spring and late spring. We do have a general lawn care guide here for your reference.
The Andersons 24-5-11 is a great fertilizer, as are most products in the Anderson line. While either of the fertilizers you mentioned could be used, we would typically suggest something like the Andersons 18-24-12 Fertilizer since it still has a high Nitrogen content for boosting upward growth of the sod, but also a high phosphorus amount to help stimulate the root growth and help it establish to the existing soil better. You really can't go wrong with any choice but that would be our recommendation for the first treatments, then you could easily swap back to the 24-5-11.
Andersons 24 - 5 - 11 Fertilizer is only labeled only for turf use. A better product would be Ironite Lawn and Plant Food Plus 12-10-10.
The coverage of The Anderson's 24-5-11 Fertilizer 50lb bag will vary depending on the rate applied (low, medium or high rate).
To treat 9,000 sq ft, you would use 18.9lbs at the low rate (2.10lbs/1000 sq ft), 37.44lbs at the medium rate (4.16lbs/1000 sq ft) and 56.25 lbs (6.25lbs/1000 sq ft) at the high rate.
Please view the product label for more information.