|i want to feed San Augustine grass and weed out clover|
I apologize for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
Clover is heading downhill with the arrival of hot weather if it is not gone already. You can prevent it with a pre-emergence product applies in late September prior to the clover sprouting for winter and next spring. You may want to take a sample of the weeds you are seeing to your Parish Extension Office and see if they can identify the problem and if necessary prescribe an appropriate remedy.
Fertilize the lawn area with no more than 1/2 to 1 pound of nitrogen in spring after you have mowed the grass twice, or now if you did not fertilize earlier this year, and again in fall (around late October). Apply a product with a 3-1-2 ratio of nutrients as this is roughly the ratio of nutrients grass takes in. So, for example, if you purchased a 15-5-10 fertilizer (15% nitrogen), you would apply about 7 pounds per 1000 square feet (1 pound / .15 = about 7). If you purchased a 21-7-14 fertilizer (21 % nitrogen), you would apply about 5 pounds per 1000 square feet (1 pound / .21 = about 5).
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!