I live in central FL and need advice on Bahia. I have a commercial account, with a strip of bahia to the front entrance. It's about 800 sq/ft. Over the past 3 months it's been thinning and filling with broadleaf weeds. I've seeded with 10 pounds of seeds, no luck. I've sprayed 2-4d herbicide, still no luck. Could someone help me with fixing this problem. The owners want it very thick, and money isn't an issue for them. Thanks.