Based upon the type of turf you are using for your Oklahoma lawn you will find your annual fertilization schedule.  Prior to fertilizing, I encourage you to have a soil test done every 2 to 3 years.  This way you will know the right fertilizer bag to buy based upon the numbers on the bag..ie 10-5-10, 32-0-10, etc. See article on Oklahoma Soil Test 

If you follow this fertilization regiment, you should find yourself with a beautiful and healthy Oklahoma lawn. Remember to water adequately and apply the fertilizer evenly.

I encourage you not to bag your grass but to put a mulching blade on your mower and leave the clippings  on your lawn as it will put nitrogen back into the lawn. Also, by not bagging your grass clippings, you wont have to buy trash sacks any more to put them in. Plus, it is a whole lot easier to mow without the mower being weighted down by the grass clippings.

Example of unevenly applied fertilizer which was probably done with a drop spreader.  You may find using a broadcast spreader  easier, but you still have to pay attention to what you are doing to be sure you application is spread evenly on the lawn.

Fertilize Oklahoma Bermuda Grass

May 1, June 1, July 1, August 1, and September 1

Fertilize Oklahoma Buffalo Grass

May 1 and August 1

Fertilize Oklahoma  Zoysia Grass

May 1, June 1, and September 1

Tall Fescue, Bluegrass, Perennial Ryegrass

March 1, May 1, October 1, and December 1

Slow Release Fertilizer

Fewer applications of slow release fertilizer are necessary for Bermuda grass because more ni­trogen can be applied per application. Therefore, the July and September fertilizer applications on Bermuda grass can be dropped if a slow release fertilizer is used. A slow release fertilizer is also recommended for the May application on fescue, bluegrass, and ryegrass lawns.

Organic Fertilization

Organic fertilizers require less water, less mowing, saves you money and will not burn your lawn. Where To Buy Organic Products  I use an organic product called Sustane, I do not bag my grass and I water deeply 2 times per week in the summer.  This can very according to current weather conditions.  The result is a beautiful, healthy green lawn.  I applied the same practice in the DFW area with St. Augustine with the same results. 

Do not forget to water the birds during  Oklahoma summers!

The “Original” Red Dirt Gardener

Red Dirt Gardening Application rates:

1 cubic yard

Covers 1296 square feet 1/4 ” deep
Covers 648 square feet 1/2 ” deep
Covers 324 square feet 1” deep
Covers 162 square feet 2” deep
Covers 108 square feet 3” deep

3 cubic foot bag

Covers 72 square feet 1/2 ”deep
Covers 36 square feet 1” deep
Covers 18 square feet 2” deep
Covers 12 square feet 3” deep

2 cubic foot bag

Covers 48 square feet 1/2 ” deep
Covers 24 square feet 1” deep
Covers 12 square feet 2” deep
Covers 8 square feet 3” deep

1 cubic foot bag

Covers 24 square feet 1/2 ” deep
Covers 12 square feet 1” deep
Covers 6 square feet 2” deep
Covers 4 square feet 3” deep

"The Original" Red Dirt Gardener