The rose bushes are social and this is an
example of synchronicity.

What on earth are you talking about? Synchronicity simply means that all the
plants of a certain species in one area bloom at the same time. What you
described simply means that you have two rose bushes which are genetically
identical.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)