Vinca major
Light: Partial to full shade; gentle morning sun is acceptable. Protect from intense afternoon sun and reflected heat.
Water: Moderate water; irrigate deeply when the top 1–2 inches of soil dry. Needs regular summer irrigation in Phoenix; avoid soggy soil.
Soil: Well-drained soil amended with compost; tolerates varied soil textures but struggles in waterlogged soil.
Mature size: 12–18 inches tall, sometimes reaching 24 inches; spreads 3–6 feet or more and can expand indefinitely where stems root.
Bloom: Primarily late winter through spring in Phoenix, with occasional flowers during mild weather.
Evergreen / deciduous: Evergreen; foliage may suffer damage from hard frost or extreme summer heat.
Growth rate: Fast with adequate moisture and protection from extreme heat.