Caryopteris Thetis flowers late from September to November. With its deep blue flowers, the Thetis is a welcome addition to the Caryopteris range. Thetis is perfect as terrace- and balcony plant.

Caryopteris clandonensis Thetis is protected by European plant breeders' rights under number 13535.

This variety has been bred by Bernd Steinegger, Germany.