Over the years I have spent on Guntersville one thing that seems to be a common theme among fisherman during the fall or frog season as many see it, is to figure out what grass is productive for the frog bite. Well I am not sure there is any great secret to it, but I have found that you can tell what grass mats can be productive with just a little drive by examination! That is correct you just need to ease by the area you intend to fish and take some observation of the mats.
The things that are common to me that seem to hold bass that will strike a frog are fairly simple. During your drive by the first thing you should look for is the condition of the mat, is it nasty, foamy, icky and will your frog make a trail, if so it’s a good sign. The next thing I consider is bait fish; if there is bait fish moving about in and around the mat then you have another piece of the puzzle.
Once you have determined the first few pieces of the puzzle then the next important consideration is the thickness of the grass; the question is, does the grass have holes in it and does it have space underneath for the fish to hide from the sun. Sometimes the mats are so thick that the grass has no space below it, when this occurs it is very hard to get a blow up. Grass mats block the sun and the water underneath is generally a little cooler by about 5 degrees and this also drives the bass to the grass mats in the hot sun!
Lastly I believe especially early in the fall or late summer the smaller the area of matted grass the better chance you have of having fish underneath it that will strike. Large mats are just too hard to cover and the smaller areas become feeding targets for bass especially if they are near deeper water.