Blockbuster™ Punch Catharanthus

Blockbuster™ Punch is an upright F1 Madagascar periwinkle (Catharanthus roseus) bred for large flowers, early flowering, and reliable color in warm weather. Syngenta lists this seed-grown annual for full sun and landscape, pack, and container use, with garden dimensions of 10–12 inches tall by 12–16 inches wide. The selection-specific details are summarized from the [Syngenta Flowers product profile](https://www.syngentaflowers.com/ams/product/flower/70092227). ## Landscape use Use it in sunny seasonal beds, borders, mass plantings, or containers. The Blockbuster series is described as well-branched, early flowering, and heat loving, making it useful for summer color after the soil warms. Its upright habit suits repeat plantings in sunny beds and mixed seasonal containers. ## Siting and water Plant in full sun in well-drained soil. [University of Florida IFAS](https://ask.ifas.ufl.edu/publication/fp112) notes that Catharanthus tolerates hot weather and advises reducing irrigation after establishment; excess water and poor drainage can cause root rot. The plant is generally grown as a warm-season annual where winters freeze. ## Maintenance Wait for warm spring weather before planting. Water during establishment, then let the soil dry slightly between irrigations. Syngenta lists this F1 selection for late-spring and summer flowering and describes upright growth. Remove spent flowers only for appearance; North Carolina Extension notes modern hybrids generally do not need deadheading.