There's a funny typo on the Wayside Gardens website. Catch it while you can, because I'm sure someone will correct it soon.
Saliva 'Purple Knockout'
Mmmmm.... I think I'll take 10 purple Saliva plants. Where should I plant purple Saliva? Does purple Saliva have a scent to it? Can purple Saliva tolerate drought? A garden can't have enough purple Saliva, don't you agree?