I suspect it will, but there's others who will know better than me.
I have the 'May Night' also, and love, love, love it. It's the first and last to bloom for me; it starts around mid-March straight through until October. I got 'Caradonna' this year and was really impressed with the dark stems/blooms. I put East Friesland, Pink Friesland, Snow Hill, Purple Haze and May Night together with some Nepeta, I'll try and remember to post a pic once it's cleaned up. The Purple Haze will probably have to come out, it just doesn't fit.
I also grow S. farinacea "Victoria Blue". It's not supposed to be hardy, but I have it against my brick porch and it comes back for me there.
Great topic!
