Adults may produce toxins to prevent anything, including the babies, from growing near them. Dispersal allows the population to find new, suitable niches. There may be other places to grow that are as good or better than where Mom is. Dispersal allows one species to suppress others - dispersal results in a greater area being occupied by the species. Dispersal promotes outbreeding which generally maintains the genetic strength of the species.
Dispersal gets the babies away from stocks of fungal spores, insect populations.
If the distance is not too great, having more individuals over a larger area can attract more pollinators and dispersers for the whole population. Discuss the ecological significance of clonal growth. Genets are the genetic individuals. Each apparent or visible individual is a ramet . For example, each new shoot of crab grass is a ramet.