This is one of the Flowers By The Sea salvias. According to the Jame Sage (Salvia VIBE® Ignition White) website,
https://www.fbts.com/salvia-vi... it was formerly sold as Salvia x 'Elk White Ice'.
While you're on the above link of VIBE® Ignition White, view the three pics there. The big pic of the three is a closeup of three beautiful white flowers. The two smaller pics show multiple flowers blooming and when you click onto them, they'll enlarge into much larger pics. You can use the arrows on the side of the pics to go back and forth between the two, if you like.
@FBTS Kermit,
I know you state full sun to partial shade, but how much shade can VIBE® Ignition White tolerate?