Garden Scheme

Plant library  ·  Shrubs

Bottlebrush

Callistemon spp.

Bottlebrush is an evergreen shrub that brings a strong upright-to-spreading presence to warm-climate planting plans. Its red, brushlike flowers arrive from late spring into summer and draw hummingbirds, making it most useful where flowering can be seen from a patio, window, or main path. At about 12 feet tall and 10 feet wide, it belongs in a generous shrub border or as a substantial landscape anchor rather than in a narrow foundation bed.

  • Pollinator friendly
  • Deer resistant
Sunlight Full Sun
Water Low
USDA zones 8–11
Spacing 8 ft
Mature size 12 ft tall, 10 ft wide
Bloom Late spring - summer

Placement and use

Set bottlebrush toward the back or middle of a deep bed, where its evergreen mass can frame lower shrubs and perennials without closing off circulation. Keep it far enough from doors, gates, and paths that its mature branches do not crowd everyday routes. A single plant can mark a sunny corner or soften the edge of a fence; repeated plants can form an informal screen when the bed has enough depth for their full spread. Give flowering branches clear sightlines from places you use most in late spring and summer.

Spacing and mature footprint

Space plants 8 feet apart, center to center, for a connected planting with modest overlap as they mature. Each shrub can ultimately occupy about 10 feet of width, so allow the bed to extend well beyond the planting line instead of pressing plants against a wall or path. For a looser composition, increase the interval and leave access lanes where pruning or cleanup will be needed.

Three plants set 8 ft apart, center to center; shaded circles show the 10 ft mature spread.

Sun, water, and soil

Reserve a full-sun position for bottlebrush, away from the shadow cast by buildings, evergreen trees, or taller shrubs. Its low water needs make it a sensible fit for sunny areas planned around restrained irrigation. Use the plant as part of a dry-leaning shrub zone rather than placing it where regularly watered plantings will dictate frequent moisture.

Seasonal notes

The evergreen canopy holds its place in the plan through the year, so account for its 10-foot spread even outside bloom. Late spring through summer is its showiest period, when red flowers add a focal point and hummingbird activity. Leave open viewing space around the outer face of the shrub rather than burying the flowering display behind taller seasonal plants.

Planning caveats

Bottlebrush is suited to USDA hardiness zones 8 through 11, so mild winters are part of its placement requirement. The common name covers plants with differing growth forms and shifting botanical names, including weeping selections that may need separate local suitability review. Confirm the exact nursery selection before repeating it across a long screen or formal row.[1]

Growing facts

Botanical name
Callistemon spp.
Type
Shrub
Category
Shrubs
Lifecycle
perennial
USDA hardiness zones
8–11
Sunlight
Full Sun
Water
Low
Plant spacing
8 ft
Mature size
12 ft tall, 10 ft wide
Bloom season
Late spring - summer
Pollinator friendly
Yes
Deer resistant
Yes
Native to North America
No

References

  1. Bottlebrush — UF/IFAS Gardening Solutions

Editorial content updated 2026-07-20.