Bushman's River Cycad
Encephalartos trispinosus

Family: Zamiaceae
Genus: Encephalartos (en-sef-uh-LAR-tos) (Info)
Species: trispinosus (try-spin-OH-sus) (Info)

Category:

Cycads

Height:

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)

Spacing:

36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)

Hardiness:

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

Danger:

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:

Inconspicuous/none

Bloom Time:

N/A

Foliage:

Grown for foliage

Evergreen

Silver/Gray

Blue-Green

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:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Non-patented

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

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

Seed Collecting:

Unknown - Tell us

Regional

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

Reseda, California

Spring Valley, California

Thousand Oaks, California

Tulare, California

Brandon, Florida

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Nov 10, 2003, palmbob from Acton, CA (Zone 8b) wrote:

This cycad is often confused with E. horridus, but its leaves are not twisted and it doesn't tend to be quite as blue colored. However, it is still a magnificent plant and should be included on anyone's list if they are collecting rare and great looking landscape plants in Southern California. This species resents warm, humid conditions, though and doesn't thrive in Florida or Hawaii- it will survive, but rarely cone. Like E. horridus, this plant is nasty spiny.

This is a somewhat variable plant with some having quite pale blue leaves and others are a flat green without any trace of blue. Also leaf morphology commonly is not trispinose, with many plants having two spines or only one. It is common to see large plants with all simple, unsplit leaflets, or so... read more