PlantFiles: Morning Glory
Ipomoea tricolor 'Heavenly Blue (Clarke's Extra Early Strain)'

Clarkes early blooming strain of Ipomoea tricolor was noticed by Mr.Clarke on his property and he had the seeds multiplied by some companies and since there were no patents on the plants some of the companies started to market the early blooming strain and it may be that some companies are claiming to have 'hybridized' what Mr.Clarke noticed growing on his property.

Member QueenB had discovered a very light colored Heavenly Blue which has been mistakenly stated to be Clarke's and sometimes passed off as 'summer skies'

See related posts and threads

http://davesgarden.com/guides/pf/showimage/59069/
http://davesgarden.com/guides/pf/showimage/165783/
http://davesgarden.com/guides/pf/showimage/165784/
http://davesgarden.com/community/forums/p.php?pid=1927592

Few people realise that 'Clarke Extra Early Strain" was introduced in 1936. The usual forms of "Heavenly Blue" were quite late flowering

The usual "darker" ipomoea tricolor these days called "Heavenly Blue" has little resemblance to the true "Clarkes Extra Early Strain" that has larger flowers, more vigour and is profuse in every manner, rather than flowering in about 120 days from sowing it flowers in about 85 to 90 days.

Often you will see the packet's marked "Heavenly Blue" and you expect the true azure powder blue...but you never get it as often the photos are recycled or the product inside does not match the photo which is usual for morning glories.

Here is "Clarke's Extra Early Strain" Also notice it is DIFFERENT than other ipomoea tricolor variations in the simmering quality and the shape of the corolla...

Clarke's Extra Early Strain is an heirloom variety that is offered by online sources so it is a distinct cultivator from Heavenly Blue. I have none for sale or trade these photos are for research purposes only.

Also see QueenB post here where Ron Convolvulacae t
suggested QueenB refer to her light blue variety as Clarke's http://davesgarden.com/members/QueenB/

***All these photos are COPYRIGHT PROTECTED and OWN THESE PHOTOS and PERMISSION IS NOT GIVEN TO REPRODUCE IN ANY FORMAT I will be watching the internet and Ebay and report any offenders***blooms in about 90 days from planting instead of about 120 days.