Vinca Flower Deadhead. But deadheading is necessary if you plant verbena for summer blooms. Keep the mulch two to three inches away from the plants stems.
Annual vinca spends all its energy on flowering to produce seeds for the next generation then stops blooming. If rains or overwatering continues the fungus can spread to the base of the plant and it can die. Some older types of vinca can self seed in the garden especially in subtropical areas.
Some older types of vinca can self seed in the garden especially in subtropical areas.
If you want to fertilize your plant or plants use a granular or water-soluble fertilizer once each month but plants generally do well with no care. Check out the top 15 easy flowers anyone can grow. Old blooms simply drop off and add to the soil. Do all flowers need deadheading though.