Skip to Content
Official Blog of the UC Master Gardener Program of Contra Costa County
by Robbie
on March 18, 2019 at 11:17 PM
The bloom doesn't look like rootstock. I would say it is more environmental conditions, colder, wetter weather. Beautiful bloom.
by Elaine Billeter
on March 19, 2019 at 5:49 PM
This looks like an example of proliferation, when the genetic controls go a bit lax and allow multiple copies of a developing structure. This instability is what has allowed people over centuries of selective breeding to go from single, 5-petalled species roses to extremes such as the Centifolia roses. I have seen a complete bud in the center of one (David Austin hybrid) rose in my own garden. This proliferation can occur in any other plant as well, and is responsible for "witch's brooms." I have seen it in Agapanthus blooms and some Salvias as well.
Reply by Steve I Morse
on March 22, 2019 at 11:14 AM
FYI... possible answer
Reply by Steve I Morse
on March 28, 2019 at 8:53 PM
See above
Leave a Reply:

You are currently not signed in. If you have an account, then sign in now!
Anonymous users messages may be delayed.

Security Code: