Bottlebrush Red Clustering

The Red Bottlebrush Cluster (Callistemon rigidus 'Red Cluster') is a striking evergreen shrub known for its vibrant red, cylindrical, brush-like flowers, 8 to 15 feet mature height, and high drought tolerance.

Plant Specifications & Growth

• Botanical Name: Callistemon rigidus 'Red Cluster' (or Callistemon viminalis)
• Flower Type: Bright red, cylindrical, brush-like blooms appearing in heavy clusters twice a year (spring and summer)
• Mature Size: 8 to 15 feet tall and 6 to 10 feet wide; can be grown as a dense multi-trunk shrub, single-trunk tree, or privacy hedge
• Hardiness: USDA Zones 8 through 11
• Wildlife: Attracts hummingbirds, butterflies, and nectar-feeding birds

Care and Maintenance

• Sunlight: Full sun, requiring 6 to 8 hours of direct sunlight daily
• Soil: Well-draining soil; highly adaptable to various soil types and moderately salt-tolerant
• Watering: Water regularly once per week (or 2–3 times weekly in extreme heat) during the first growing season to establish roots; highly drought-tolerant once established
• Pruning: Prune after the spring bloom cycle to shape into a tree form, or trim lower base shoots if a multi-stemmed bush look is preferred