HOW TO GROW & CARE FOR MACROZAMIA CYCADS

Australian Cycads

Quick Facts About Macrozamia

• Botanical Name: Macrozamia spp.
• Common Names: Macrozamia, Australian Cycads, Zamia Palm (for some species)
• Plant Type: Evergreen cycad
• Climate Zones: Warm temperate to subtropical (frost tolerant once established)
• Sun/Shade: Full sun to part shade
• Growth Habit: Slow-growing, trunk-forming cycad
• Height/Width: 1–7 m tall depending on species
• Flowering Time: Cones form intermittently, often after many years
• Foliage: Glossy, stiff to arching fronds, green to blue-green
• Flowers: Cones (male and female on separate plants)
• Special Attributes: Extremely long-lived, drought tolerant, architectural form

Description

Macrozamia are a distinctive group of Australian native cycads that remain surprisingly underused in landscaping, despite being exceptionally well suited to local conditions.

These ancient plants are slow-growing, long-lived, and highly ornamental, with bold, arching foliage that creates strong architectural impact in gardens. Many species naturally occur along coastal New South Wales, Queensland, Western Australia, and parts of the Northern Territory, making them well adapted to Australian soils and climates.

Once established, Macrozamia are tough, drought tolerant, and low maintenance, making them ideal for both residential gardens and large-scale landscape projects.

Important Warnings

• Poisonous/Toxic:
• All parts of Macrozamia are toxic if ingested. Seeds are particularly dangerous to pets, livestock, and humans if not properly treated.Invasive/Weed Potential:
• Not invasive. Growth is very slow and controlled.

Planting Macrozamia

When to Plant:
Spring to early autumn is ideal, allowing roots to establish before extreme cold or heat.

Where to Plant:
Choose a position with good air circulation and adequate space for mature size. Suitable for garden beds, feature plantings, and large containers.

Soil:
Free-draining soil is essential. Sandy or loamy soils are ideal. Avoid heavy clay unless amended for drainage.

Spacing:
Allow at least 1.5–3 m between plants depending on species.

Container/Pots Suitability:
Yes. Many species, including Macrozamia moorei, perform exceptionally well in large containers and make excellent feature plants.

Ongoing Care for Macrozamia

Watering:
Water regularly during establishment. Once established, Macrozamia are drought tolerant and require minimal supplemental watering.

Amendments and Fertilizer:
Apply a low-phosphorus native plant fertiliser in spring. Avoid excessive feeding.

Pruning and Deadheading:
Remove old or damaged fronds as needed. Avoid excessive pruning as growth is slow.

Overwintering:
Most species tolerate light frost once established. Young plants benefit from frost protection in colder areas.

Propagation

All Macrozamia species are propagated from seed. Germination can be slow and requires patience, often taking many months. Seed-grown plants are long-lived and resilient but will take several years to develop noticeable trunks.

Pests and Diseases

Macrozamia are generally pest resistant.
Occasional issues may include:

• Scale insects
• Mealybugs (mainly in container-grown plants)

Good airflow and proper drainage prevent most problems.

Varieties, Species and Cultivars

• M. moorei is the largest, reaching 5 – 7 m and resembling a small ‘date palm’ but we think it is more attractive. A large trunk and very attractive foliage that weeps down over the trunk with age. M. moorei is suited to growing in containers, an excellent feature plant. Read more about Macrozamia moorei……
• M. flexuosa is another small growing species with twisted leaves, from the central coast of NSW this one is closely related to Macrozamia pauli-guilielme.
• M. pauli-guilielme is an interesting small growing species from South East Queensland, often referred to as the ‘Pineapple cycad’ as the cones that appear look like ‘pineapples’. The foliage is fine and twisted, endangered in its natural habitat this is a much neglected species.
• M. macdonnellii from the Macdonnell Ranges in the Northern Territory.
• M. spiralis from areas around Sydney. Another fascinating species with a growth habit that leads to slightly twisting habit in the fronds.
• M. miquelii from the coastal forests of southern Queensland. Not as widely used as some others, this is species that has a future as a landscaping plant if properly promoted. Although classed as a medium sized cycad, it will still reach 2m in height over time.
• M. riedlei also known as the Zamia Palm. From Western Australia. With a stiffly upright growth habit the foliage is a mid to deep green however with a slight blue look to it as with many cycads. Seed cones are a re large and form in the center of the plant at the base.
• M. stenomera a small species from NSW. The foliage is perhaps the most intense blue of any of the cycads. It is very rare in cultivation

Design Ideas

• Feature plant in courtyards or entry gardens.
• Architectural accent in modern landscapes
• Grow in large containers for patios and poolside planting
• Native and coastal gardens
• Pair with grasses, lomandra, and other Australian natives for contrast

FAQ

You may also be interested in

• Macrozamia moorei
• Euphorbia
• Bali huts
• Tropical plants

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Author Bio
“Written by JohnnyA, drawing from horticultural sources, a certificate in propagation, membership of horticultural societies and over 40 years of practical gardening experience and producing YouTube gardening tutorials.”