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Cycad
Dioon rzedowskii

Family: Zamiaceae
Genus: Dioon (dy-OH-awn) (Info)
Species: rzedowskii (re-DOW-skee-eye) (Info)

Category:

Cycads

Height:

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)

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:

Sun to Partial Shade

Light Shade

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:

Unknown - Tell us

Bloom Time:

Unknown - Tell us

Foliage:

Grown for foliage

Evergreen

Velvet/Fuzzy-Textured

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

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:

Thousand Oaks, California

Anahola, Hawaii

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Feb 15, 2004, palmbob from Acton, CA (Zone 8b) wrote:

Another great tropical looking Dioon with wide leaflets. This one develops quite a bit of trunk (in many decades)- up to 15'. It has leaves that as a seedling, closely resemble Dioon spinulosum, but emerge with a pronounced tomentum on them. As the plant matures the leaflets become simple without any spines (except the sharp terminal one), similar to Dioon mejiae. This plant is from central Mexico. I have found it to be slow grower compared to D spinulosum but easy germinator and pretty hardy to cold. Doesn't seem to like our blazing So Cal sun though.