This is a chart that I found online several years ago. It was always in the back of my mind to link to it, or else contact the creator for permission to use it on this website.
However, since that time, the page has gone offline, and the original creator is unreachable. It’s a shame to let something like this go to waste…I know a lot of rose lovers will find it a very handy reference tool.
So rather than let the chart sink into obscurity, I have reproduced the offline copy that I had kept. If the original author wishes to contact us regarding the use of this, I would be delighted to hear from him!
In the meantime, we will assume the author would wish this information to be freely available to rose lovers and growers around the world.