Dianthus barbatus 'Rockin'™ Red'

Growing and Maintenance Tips:

Grows best in average to medium moisture in a well-drained soil, in full sun. Removing spent flowers will extend the bloom time and pruning in late summer will help maintain its shape. No serious disease and insect issues. 

However, Dianthus barbatus cultivars are usually considered biennial, so as much as deadheading spent blooms will extend flowering time, leaving some late flowers is essential, to ensure survival.