I've had seedlings whose color has changed after the first flush and have a number of brugs whose color changes as the flowers age but I've never had what you describe happen. Temp can affect the color and the soil might to some degree but I don't think the color can be dramatically changed like hydrangeas can by adding iron or anything else. At least I've never heard of it happening.

I had one do a color change as well. It was deep orange the first time it bloomed the next year it was pale yellow.........still nice tho....
Russ

yes the white ones are pretty, but will experiment with the cuttings this year in radically different types of soil thanks for the post.

I bought two from Lowes, I think they are Charles G. In the winter the blooms are pale yellow, in the spring and summer the blooms are dark yellow. I think the temp, and sunshine affect the color. You would not believe the difference. These plants have never froze, and bloom year around. In the winter months, it may just have one or two light yellow blooms, but right now it is covered with dark yellow blooms. Barbra,

I would just be happy to see any color at all right now lol.

It is still raining. Had to up pot the little seedlings yesterday since they were so waterlogged. I was afraid they die on me before I even see ONE bloom of em.

Lucy