Callistemon, Red Cluster Bottlebrush Tree 'Clemson Hardy'

Callistemonrigidus

Family
Myrtaceae (mir-TAY-see-ee)
Genus
Callistemon (kal-lis-STEE-mon)
Species
rigidus (RIG-ih-dus)
Synonym
Sun Exposure
Full Sun
Foliage
Grown for foliage
Evergreen
Height
10-12 ft. (3-3.6 m)
Spacing
6-8 ft. (1.8-2.4 m)
Hardiness
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Bloom Color
Red
Bloom Time
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Other Details
Category
Trees
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
From semi-hardwood cuttings
From seed; direct sow after last frost
Seed Collecting
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Regional

This plant is said to grow outdoors in the following regions:

Kingman, Arizona

Punta Gorda, Florida

Newberry, South Carolina

Simpsonville, South Carolina

Austin, Texas

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Gardener's Notes:

1
positive
0
neutral
1
negative
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H
Greensboro, NC (Zone 8a) | August 2022 | positive

So far, so good. After protection the first winter, this plant sailed through a hard Zone 8 winter with only a brick wall microclimate fo...Read More

D
Sumter, SC | August 2011 | negative

I bought 3 BB's labeled "Clemson Hardy" at Lowes, but they don't have the characteristic colors of rigidus on their new growth, and they ...Read More

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