Quote Originally Posted by blackcrystal22 View Post
I bet that grass has formed some type of ... I can't think of the word.. not a parasite.. (I learned about it in Biology and Horticulture) but something that has learned to live in harmony with another organism while they both benefit, or one benefits and the other loses nothing.
No way are they symbiotic. If you let that grass grow it will be fighting for the same nutrients and roots space as the ornamental. There is no benefit for those two plants to be growing so close together. It usually happens between a plants roots and certain fungal mychorhizae. Not usual between two plants.