Eucalyptus macrocarpa
Rose‑Scented Mallee with Giant Scarlet Flowers

Eucalyptus macrocarpa, commonly known as the Mottlecah, is one of Western Australia’s most iconic mallee species, celebrated for its enormous scarlet flowers and striking powdery blue foliage. The dramatic contrast between its vivid blooms and silvery leaves makes it one of the most ornamental eucalyptus species available.

Well suited to Mediterranean, coastal, and water‑wise landscapes, Eucalyptus macrocarpa thrives in full sun with excellent drainage. Its shrubby mallee form, show‑stopping flowers, and drought tolerance make it ideal for feature planting, native gardens, and collectors seeking rare and sculptural Australian species.

Botanical Characteristics of Eucalyptus macrocarpa

Characteristic	Detail
Common Name	Mottlecah, Rose‑Scented Mallee
Plant Type	Mallee‑form evergreen shrub
Foliage	Large, round, powdery blue leaves with a soft, silvery bloom
Flowers	Huge scarlet‑red blossoms up to 4–5 inches wide
Flowering Season	Late winter through spring; sporadic summer blooms
Special Features	Massive flowers, striking blue foliage, drought tolerant, highly ornamental

Mature Size and Form

• Height: 6–10 ft
• Spread: 6–12 ft

Eucalyptus macrocarpa grows as a multi‑stemmed mallee shrub with broad, sculptural branches and large, rounded leaves. Its bold form and oversized flowers make it a dramatic focal point in native and ornamental landscapes.

USDA Hardiness Zones

Zones 9–11

Performs best in mild‑winter climates with full sun, excellent drainage, and low humidity. Protect from hard frost when young.

Cultivation and Care for Eucalyptus macrocarpa

Aspect	Care Instructions
Sunlight	Full sun for strongest flowering and foliage color
Soil	Very well‑drained sandy or gravelly soil; avoid clay
Water	Very low once established; deep, infrequent watering
Fertilizer	Minimal; avoid phosphorus‑rich fertilizers
Pruning	Light shaping only; retains natural mallee form

Landscape Use and Benefits of Eucalyptus macrocarpa

• Show‑stopping scarlet flowers for dramatic focal points
• Ideal for Mediterranean, coastal, and water‑wise landscapes
• Excellent for native gardens, collectors, and sculptural plantings
• Powdery blue foliage provides year‑round visual impact
• A rare and striking addition to curated ornamental tree and shrub collections