They are not social in any anthropomorphic sense. They don't need company of
their own for emotional support or anything like that. Its purely a matter
of having others nearby for reproduction.

To maintain outbreeding plant populations, several plants need to grow
within fairly close proximity to ensure pollination and seed production. If
you are not trying to produce seeds or are creating a naturalized
population, there is really no need to have several of the same plants
except for aesthetic value.


Frank Martin wrote in message
...
Are some plants better planted in a group of their fellows than just
singly?
My grandmother says some plants are like flocks of birds and do better in
a
group. Does anyone know about this?