Irregular Rose Colorations
My Morden Centennial shrub rose is producing pale pink
blossoms this year. Since it was planted 4 years ago, the flowers have
been a much darker medium pink, the characteristic color of this
variety. The flowers are being produced from stems from the same canes
that previously produced darker flowers.
Why? How can I get back to the original color?
I am a master gardener working to educate the public including
sound gardening principal. However, I am stumped by this color change.
There are a few possibilities, but I would be inclined to consider what
the soil pH is and whether the variety has a recommended pH for optimal
The following might be helpful:
Anthony Brach Ph.D.
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Update: June 2012