Working with Clean Genes

For the last few years, I have been putting a lot of effort into cleaning up the Hulthemia hybrids.  I have made crosses between the Hulthemias and 'Darlow's Enigma', "Basye's Thornless" and the Knock Out family of roses.  I'm not sure why it is, but the Hulthemia blotch seems to be less visible in seedlings when resulting from crosses with these cleaner roses.  Nevertheless, I keep trying.  

This is the first time that I am seeing the 2015 seedling shown below blooming outside.  'Knock Out' is a grandparent.

Though not as pretty, the brand new seedling shown below, is a 2016 seedling blooming for the first time inside the greenhouse.  It is a first generation 'Knock Out' seedling and has the best blotch that I have seen in direct first generations descendants.  As it matures, I expect the blotch to get bigger and more defined.