St. Augustine grass
This is our 1st year for organic gardening. Our St. Augustine was laid 2 yrs ago. Last year it did fairly well. This year we have some bare spots. Now I notice yellowing of the blades. This is spotty yellowing. I mean it's here and there. So far, I have applied corn meal (the cheap brand from walmart),An organic fertilizer, coffee grounds,Texas green sand, and dried cow manure. We bought the hound dog and aerated really well. I looked closely and didn't see any chinch bugs, and I dug 3 spots and didn't see a grub. We have the clay soil. After we aerated we had a good rain. I was hoping to have good results from organic gardening, now my husband thinks I messed up. Did I mess up? What do I need to do now? Please help!!