Red Cluster Bottlebrush Tree
Calistemon rigidus ‘Clemson Hardy’
Plant Details
USDA Plant Hardiness Zones: 8b–11 Find Your Zone
Plant Type: Evergreen Flowering Large Shrub or Small Tree
Height at Maturity: 12-15′
Width at Maturity: 8-10′
Spacing: 6-8′ for solid hedges; 11’+ for space between plants
Growth Habit / Form: Round, Upright
Growth Rate: Moderate, Fast
Flower Color: Bright Red
Flower Size: 3-4″ in length
Flowering Period: Spring, Summer
Flower Type: Cylindrical, Bottlebrush-like
Fragrant Flowers: No
Foliage Color: Medium to Dark Green
Fragrant Foliage: No
Berries: No
Berry Color: NA
Sun Needs: Full to Mostly Sun, Some Shade is tolerated
Water Needs: Average
Soil Type: Clay (Amended), Loam, Sandy, Silty
Soil Moisture / Drainage: Well Drained Moist
Soil pH: 6.0 – 8.0 (Acid to Slightly Alkaline)
Maintenance / Care: Average to Low
Attracts: Visual Attention, Butterflies, Birds
Resistances: Deer – more info, Disease, Drought, Dry Soil, Heat, Insect
Description
One look at the flowers and you’ll know where this shrug got its name. Twice a year, in spring and then again in summer, the Red Cluster Bottlebrush produces an abundant display of cylindrical, vibrant red flowers shaped just like a bottlebrush that nearly cover the foliage. At 12 to 15 feet tall and 8 to 10 feet wide, you can grow Red Cluster as a large shrub or lower branches can be removed to form a highly attractive small tree. A very easy-to-grow and low-maintenance plant that is sure to draw attention from passersby and the hummingbirds and butterflies, who will appreciate you for planting it!
Landscape & Garden Uses
Growing 12 to 15 feet tall and 8 to 10 feet wide, the Red Cluster Bottlebrush can be grown as a large shrub or lower branches can be removed to form an attractive small tree. It is ideal for use as a focal point specimen, in groupings, or as formal or informal hedge or privacy screen. A fine addition to tropical gardens, butterfly and hummingbird gardens, red theme gardens and the Xeriscape (low water needs).
Suggested Spacing: 7 feet apart for solid hedges; 14 feet or more apart for space between plants
Growing Preferences
Red Cluster Bottlebrush is exceptionally easy to grow in most any moist but well-drained soil. Prefers full sun but will tolerate some shade. Plants will require a moist but well-drained soil when young but established plants are very drought tolerant. Bottlebrush have very few if any insect or disease problems, and deer won’t touch them! Tolerates lots of heat and salt air.
Helpful Articles
Click on the link below to find helpful advice from our experts on how to plant, fertilize, prune and water Callistemon Bottlebrush shrubs.
How To Plant & Care For Bottlebrush Plants
Plant Long & Prosper!
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