That half-and-half leaflet is a fun surprise, Ian — it looks like a spontaneous chimera variegation rather than anything to worry about. Since it's grafted, I'd just watch whether more leaves on that cane come out the same way, and whether the variegated part stays healthy in the sun. Did the rest of the plant look normal otherwise?

Thanks for the comment! I know that mosaic virus can look similar to variegation but wanted to show you guys hear and see what your opinions were. Neat!

Rose Mosaic Virus does not seem to show symptoms like your leaflet in the photo has. If that rose is a product of a less than well raised background (top propagating techniques used by a reputable grower), who knows what maladies it acquired and now possesses. Then again, that could just be a flukey coloration that does not recur.

I used to grow an Apricot Candy which bloomed its head off, but alas, defoliated from excess summer heat coupled with serious vulnerability to black spot. Before I became fully aware of the lone, original one's weaknesses, I put in three more Apricot Candys. I liked it so much.

The three came from a reputable online rose nursery, gallon size. Every one had Rose Mosaic Virus symptoms as soon as their grower's foliage stripped stems leafed out (Did I give you a hint of the nursery name?), but the RMV symptoms cleared up and never recurred for the next ~4 years.

It was then I removed the bushes, all 4, even though they bloomed with abandon, but I wanted to have as black spot free a rose garden as is possible without regular spraying. Hence, they all 4 got evicted. Their foliage could not take heat. It just dropped off about half way up a cane by August 1, even with no black spot present.

Have I reached my black spot free rose garden goal? No, not yet. That goal may never be entirely attainable. Black spot mutates. Varieties that are resistant to most strains may succumb to new ones. It's a continuous, ever changing drama......fighting black spot.

Moses.