This weed is very persistent and CAN and WILL grow ANYWHERE that is sub-tropical in climate. Lush pastures, sandy beaches, concrete jungles and marshy wetlands- can all house this dangerous weed. Therefore, adopting a diligent pasture management program with the proper herbicide is very important in helping you ward off this predator plant. Creeping Indigo is rooted VERY FIRMLY in the soil, making it difficult to manually remove. So, the most effective plan of attack for this particular weed is to treat it with the proper HERBICIDE. Pest & Lawn Doctors offers a solution to this toxic weed — a herbicide that eliminates the toxic weed yet is safe for horses.