I came across a landscaping business, that was going "under' about 2012. Then, I tried to "locate a source", & only two photos were even shown,at the time, (in Google "images",) while I was attempting to locate any plants, or seeds.. So, I returned, to "collect" seeds, of just the two colors that were planted, from those Dianthus, with a "Botanical style Name" , marker, identifying simply as 'Bearded Dianthus'.. One pink & the other , being white flowered & other colors appeared , all except for "purple", from those seeds.