Symbiosis and mutualism is not the same as being "social" in the sense
animals group together to form herds or flocks.

Frank Martin wrote in message
...
Is there are relationship here among a genus? For example, if tomatoes do
well in a group, is the same result observed if some of the tomato plants
are replaced with tobacco and potato (related species)?
"D. Kauhl" wrote in message
...
in all the answers I'm missing the hint for allelopathie, the research
of
reciprocal
influences of plants, practicized by friends of "Mischkultur", mainly
explained
by mycorrhizal effects in the edaphone -
founded by H. Molisch, university of Vienna, 1937, "Der Einfluß einer
Pflanze
auf die andere - Allelopathie" -
you can hear more of this from orchid friends, it's their primary focus
best regards
kauhl

"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?