I personally prefer white frost over Elsa Sass, but Elsa Sass is a great choice if you don't have any late season bloomer. I have white frost planted along the driveway that receives full sun and Elsa sass near the house that receives morning sun. I generally only get one or two blooms that ball up from Elsa sass towards the end of the season. It's fairly prolific, but the weak neck requires a lot of staking for me and the fade is unattractive. As for white frost, I can't seem to get it to develop more than 3-4 blooms per season, but every single bloom comes out picture perfect and quite large. I only need to stake white frost when it rains or during high wind. The fade is also nice, it turns into a creamy yellow before fall off.
