Plants bloom in March or April and sometimes again in the fall. Vinca minor grows about 6 inches tall, spreading in all directions by sending out long trailing and rooting shoots, which make new plants.

Does Vinca minor bloom all summer?

Abundant flowers bloom continuously throughout the summer. Summer-flowering vinca is hardy in USDA zones 9 through 12, and is treated in lower hardiness zones as an annual.

Why are my vinca not flowering?

The most likely cause for periwinkles not flowering is insufficient nutrients in the soil and/or a lack of water getting to the roots. Inadequate sun and too much shade exposure, as well as unsuitable weather conditions, can also affect the blooming of a periwinkle.