started an earth berm in my moms front yard

it is a nautilus design wrapped around a maringa I planted and I sowed a bunch of goodies with fukuoka seed balls last month... I am in Fla and there seems to be a weed with purple leaves and thorns along its nodules that is trying to outcompete everything even though I used the fukuoka mulching method... this weed is fierce, purple leaves shoots up about 3 feet and does not go away.


Any ideas on how to protect my plants from this sucker... I will try to get pictures from this weekend when I go back.