My boat has three T-foils. Each "T" is about three feet wide. This boat can roll a lot of grass.

Going down Biscayne Bay in the Conch Cup was memorable for it's grass. I could only come up with one solution that worked reasonably well (short of going out there on the hulls to clean it off by hand). I stopped the boat and sailed backwards three or four times and that usually slid (slid?) most of it loose. Don't feel bad about doing it. The big long distance boats (eg. VO 60's) do the same thing to deal with the problem when it's caught on their keels.