Crimson bottlebrush
Melaleuca citrina
Crimson bottlebrush (formerly Callistemon citrinus, and still sold and grown under that name almost everywhere) is a bold evergreen shrub native to New South Wales, Queensland, and Victoria in eastern Australia. From spring through fall - and nearly year-round in frost-free climates - it carries dense, cylindrical, crimson-red 'bottlebrush' flower spikes packed with long protruding stamens, held above narrow, lance-shaped leaves dotted with oil glands that release a distinct lemony citrus scent when bruised (the species epithet citrinus means 'related to citrus'). Left unpruned it can reach 10 to 15 feet tall and wide as a large shrub or small tree, but it is more commonly trained as a 3 to 5 feet shrub, and it tolerates hard pruning well, regenerating new growth from old wood. It wants full sun and does best in moist, fertile, well-drained soil, though it tolerates waterlogging and, once established, drought; it prefers acid soil, and its leaves can yellow in alkaline or salty ground. It is frost-tender: NC State puts its winter hardiness at only 20 to 25°F and says it needs winter protection in zone 8. USDA PLANTS lists no invasive or noxious status for it in the US, Plants For A Future gives it no weed potential, and NC State Extension lists it as non-toxic to cats, dogs, and horses - though it is grown as an ornamental, not a food crop.
Climate fit: narrow (26/100)
Focal point
Pollinator
Border
Container
Light
Full sun
Water
Moderate water
Mature size
3-15 ft tall · 4 ft apart
Hardy in zones
8b-11b
frosty to nearly frost-free winters
Life cycle
Perennial
Bloom period
Spring / Summer
Native in Illinois
No
NC State notes the flowers attract bees, and the long spring-to-fall bloom season makes it a dependable, extended source of nectar and pollen.
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Won't grow here
Zone 7a
Plotwright
0°F to 5°F
Won't grow here
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✕
Out of range today and still out of range in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 8 ecoregions - 4 climate-resilient through 2070 · 4 newly possible by 2070. Best matches first.
Plant this, not that
Better fit for this place
For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Educator packet
Plant packet
Crimson bottlebrush educator packet
Crimson bottlebrush (formerly Callistemon citrinus, and still sold and grown under that name almost everywhere) is a bold evergreen shrub native to New South Wales, Queensland, and Victoria in eastern Australia. From spring through fall - and nearly year-round in frost-free climates - it carries dense, cylindrical, crimson-red 'bottlebrush' flower spikes packed with long protruding stamens, held above narrow, lance-shaped leaves dotted with oil glands that release a distinct lemony citrus scent when bruised (the species epithet citrinus means 'related to citrus'). Left unpruned it can reach 10 to 15 feet tall and wide as a large shrub or small tree, but it is more commonly trained as a 3 to 5 feet shrub, and it tolerates hard pruning well, regenerating new growth from old wood. It wants full sun and does best in moist, fertile, well-drained soil, though it tolerates waterlogging and, once established, drought; it prefers acid soil, and its leaves can yellow in alkaline or salty ground. It is frost-tender: NC State puts its winter hardiness at only 20 to 25°F and says it needs winter protection in zone 8. USDA PLANTS lists no invasive or noxious status for it in the US, Plants For A Future gives it no weed potential, and NC State Extension lists it as non-toxic to cats, dogs, and horses - though it is grown as an ornamental, not a food crop.
Scientific name
Melaleuca citrina
Plant type
shrub
Hardiness
8b-11b
Light
full-sun
Moisture
moderate
Spacing
4 ft
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Crimson bottlebrush (Melaleuca citrina). Retrieved 2026, October 9, from https://plotwright.com/plants/melaleuca-citrina
Sources used for this record
This record is compiled from the sources below.









