Annual vinca is drought tolerant but does best if you water the plants whenever the top inch or so of the soil feels dry to the touch. ... Annual vinca doesn't require deadheading, or the removal of faded flowers, to continue blooming, making it a wonderfully low-maintenance annual flower for sun.

How do you deadhead vinca?

Deadheading Annual Vinca

Regular deadheading encourages the plant to bloom right up until frost. To deadhead, grasp a spent flower below its base and above a set of leaves. Holding it between your thumb and forefinger nails, gently snap it free.

Should you prune vincas?

Avoid pruning vinca minor during May and June while it's in bloom to keep from losing the colorful blossoms before they die a natural death. Perform a hard prune every two to three years to control growth, rejuvenate vinca minor and encourage its best performance.