Hibiscus: Hibiscus 'Old Yella' and Other Horticulture Myths, 2 by Michael_Ronayne

Michael_Ronayne wrote:
The hardy Hibiscus in which I have been most disappointed is Hibiscus 'Old Yella'. I purchased Hibiscus 'Old Yella' at a local garden center several years ago, anticipating the same flower which appeared on the plant description tag. As the attached photographs show, the bud of 'Old Yella' opens with great promises and is truly yellow. Upon fully opening, Hibiscus ‘Old Yella” turns white in my garden. Many reputable growers such as Sooner Plant Farm, in whom I have the highest respect and purchased Hibiscus, display photographs of Hibiscus 'Old Yella' with a yellow flower.

Hardy Hibiscus 'Old Yella' Fleming Hardy
http://www.soonerplantfarm.com/index.cfm?fuseaction=plants.p...

However, the Missouri Botanical Garden, who maintains the most extensive collection of hardy Hibiscus in North America, has photographs of Hibiscus 'Old Yella' which are in agreement with the plant in my garden.

Hibiscus 'Old Yella'
http://www.missouribotanicalgarden.org/gardens-gardening/you...

Fleming’s Flower Fields is now offering a new and improved Hibiscus “Old Yella” named Hibiscus “New Old Yella”.

Fleming Dwarf Hibiscus tm;, 'New Old Yella'
http://www.flemingsflowers.com/index.cfm?fuseaction=plants.p...

The Hibiscus is described as follows:

“'New Old Yella' is a big improvement on 'Old Yella' because it is half its size and more yellow in color. It is so compact that its leaves are also a small green "maple" shape. It is hardy to -30 degrees Fahrenheit like all of the Fleming Hardy Hibiscus tm. This hybrid is complimentary to all landscapes and patio scapes.”

The description “more yellow in color” when applied to Hibiscus ‘Old Yella’ is deceptive because almost anything is more yellow than white. Having been fooled by Hibiscus ‘Old Yella’, I am very reluctant to purchase Hibiscus ‘New Old Yella’ without a money back guarantee that it will perform as promised.

Excluding the likely possibility that Hibiscus ‘Old Yella’ owes more to Photoshop than the breeding skills of the Fleming brothers, the possibility has crossed my mind that the color of Hibiscus ‘Old Yella’ may depend on growing conditions.

Has anyone grown Hibiscus ‘Old Yella’ which performed as advertised and if so, what were the growing conditions?

Has anyone grown Hibiscus ‘New Old Yella’ and what were the results?

Mike