The flower color that appear on the plants is determined solely by the genes
they contain. If they are hetrozygous, plants with different colors may
appear in the F2 generation but only from the genes of the parent plants.

I have noticed that plants of a single color will eventually dominate to be
the only color present in a population if that is the color preferred by the
particular pollinator. The pollinators are the ones in control not you. They
will actually ignore the flowers of a particular color they don't like.


"GrampysGurl" wrote in message
...

Coneflowers can be purple, pink or white but not on the same plant and
the
color cannot be changed. Its genetics not pH.



seedlings porobably wouldn't be same color as parent plant once they grew
either especially if you have different color coneflowers nearby.