Allison,
I don't know, I never got mine planted and it died.
The blooms were beautiful. Pic is of the flowers blooming on my porch in its black nursery pot.
Since it was a seedling to start with, it's going to drop seeds. You can always cut the faded flower stems off before they go to seed.
Salvia 'Madeline'
ATP db... Plant Spread: 18-24 inches
Salvia 'Madeline'
DG.... May be a noxious weed or invasive
http://davesgarden.com/guides/...
Plant Delights....
http://www.plantdelights.com/S...
ATP duane456 grows it.....
The thread "Salvia 'Madeline'" in
Agastache and Salvias forum