Problem you are going to run into with 10-10-10, 20-20-20, 10-20-10 and the likes are they are ammonia nitrate fast release formulas. 15-5-10, 20-5-10 made by Lesco are encapsulated urea slow release formulas recommended by the Bermuda Bible. Trust me I know, I wrote the Bible.

Having said that the document recommends a 3-1-2 application in lieu of a soil test for either the first or last application of the year. Given that IMO there is no problem with over application or abuse of a high phosphorous fertilizers.

The key I want YOU to pick up on is SLOW RELEASE NITROGEN formulas for which you should be able to find with as high as of First number as you find like 36-0-X. Then if you want or need some Phosphorous buy some Super Phosphate or Triple Phosphate and apply it. I would suggest a soil test before doing so because if your soil has sufficient levels, adding more is not going to do any good.

Lastly if you cannot find Slow Release Nitrogen urea, then buy straight fast release urea 46-0-0. It is the least expensive of all fertilizers based on application rates. But you must make some changes and exercise some caution when using it. The whole point of Slow Release is it is easy peazy apply once every 30 to 45 days and it will release slowly and feed the grass. Straight urea is HOT and very fast release.

So here is how to use it safe and effectively.

1. Apply ONLY to DRY GRASS. DO NOT APPLY TO WET GRASS. If you do it will burn the grass. The granules will stick to wet grass and quickly dissolve.

2. Apply at either 1/4 or 1/2 rate application. If you apply at 1/4 rate, apply it every week. If you opt for 1/2 application apply every two weeks. If you apply at full application rates you will get great green burst of growth for a week or two then peters out leaving you with so so color for two weeks waiting 30 days in between applications. FWIW golf courses fertilize their greens once a week at 1/4 rate.

3. Water it in immediately after application.