I've been growing Secret for over 10 years and it is so hardy. It loves to be dead headed and will flush 3-4 times per year here in my Zone 8 b garden Central Coast California. I lightly prune in January and then again when I deadhead. I give a feed of manure, then comfrey nettle tea and Max Sea ...throughout the growing season. The flowers are always perfect.
Brought this back on 2/3/2019 from Christianson. Grafted. Still sits on a 5 gallon pot. To see what will happen in spring after harsh winter storms this year.