Carissa macrocarpa
Light: Full sun to partial shade; afternoon shade is beneficial in Phoenix, especially near walls or paving that reflect heat.
Water: Low to moderate water once established. Water deeply, then let the upper few inches of soil dry; irrigate more frequently during extreme summer heat and establishment.
Soil: Well-drained sandy or loamy soil; tolerates alkaline conditions but not persistent saturation.
Mature size: Typically 6–10 feet tall and 4–6 feet wide as a maintained standard; size varies with cultivar and pruning.
Bloom: Primarily spring through fall, with intermittent flowering during warm weather.
Evergreen / deciduous: Evergreen; foliage may be damaged or shed after frost.
Growth rate: Moderate; faster with warmth and adequate irrigation.