They are truly spectacular! I have a few of the Spring Valley Hybrids from Brent and Becky's (hybridized and grown in the US). They were offered as a mix and my tallest is golden yellow with some orange on the buds. It has exceeded 7 feet. There was a lovely white in the mix, but it has never gotten that tall (usually 4-5 feet).
I divided some a couple of years ago and lost a division of this one. It is rebounding though.
