I suspect that this gorgeous periwinkle clematis would be a lot more popular if you could find better colored pictures of it on the Internet (and in some books). In my opinion, it is the Internet that has the bulk of these erroneous photos (colors ranging from really blue to a sort of grey) and since this is how many gardeners are now making their selections for their gardens it worries me.
As with all my photographs of clematis I strive to capture the closest coloring to nature as I can, so when you view them on your monitor (see Pictures don’t lie. Or do they?) I will be keeping my fingers crossed that you will be seeing their true coloring. There will always be some different color saturation when pictures are taken at different times during the day and times of the growing season. Here is a description of the coloring you should be observing for this particular clematis: the flower’s tepals are colored an attractive lavender-blue with just a hint of red at the base of each tepal.
The flower itself is 6” to 8” in diameter and has 6 crenulated and slightly overlapping tepals. Its stamens are golden which provides a nice contrast against the bluish tepals. Reaching a height of 6 to 8 feet it thrives in sunny locations. Because of its compact size it makes an excellent container selection. This clematis has the ability to repeat bloom throughout the season. It grows in USDA Zones 4 through 11. You may prune it either light or optionally.
We do know that Clematis ‘General Sikorski’ is another Polish introduction, but to date it is unclear whether the actual breeder was Wladyslaw Noll or Brother Stefan Franczak.