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PlantFiles: Cycad
Macrozamia johnsonii

Family: Zamiaceae
Genus: Macrozamia (mak-roh-ZAM-ee-uh) (Info)
Species: johnsonii (jon-so-nee-eye) (Info)


4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)

10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)

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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Seed is poisonous if ingested
All parts of plant are poisonous if ingested
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:
Unknown - Tell us

Bloom Time:

Grown for foliage

Other details:
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
This plant is fire-retardant
This plant is resistant to deer

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From seed; germinate in vitro in gelatin, agar or other medium

Seed Collecting:
Unknown - Tell us

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There are a total of 16 photos.
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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive BayAreaTropics On Sep 15, 2011, BayAreaTropics from Hayward, CA wrote:

A pair of these planted as entrance plants at the Oakland Zoo have reached huge sizes in less then a decade. So,cool summers and basic care are good enough for this tough-but still expensive,cycad. Like a nice small palm with a thick crown of fronds.

Positive palmbob On Aug 16, 2003, palmbob from Acton, CA (Zone 8b) wrote:

This is one of the easiest cycads to grow in Southern California. It eventually forms a massive trunk, not unlike a Phoenix canariensis palm(though not that big). It has flat leaves, unlike its similar cousin, M moorei. Also from Australia.


This plant has been said to grow in the following regions:

Brentwood, California
Encino, California
Reseda, California
Thousand Oaks, California
Visalia, California
Fordoche, Louisiana
Cayce, South Carolina

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