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Aloe castellorum

Family: Aloaceae
Genus: Aloe (AL-oh) (Info)
Species: castellorum (kas-tel-LOR-um) (Info)


Cactus and Succulents


12-18 in. (30-45 cm)


Unknown - Tell us


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

Light Shade


Unknown - Tell us

Bloom Color:

Bright Yellow

Chartreuse (Yellow-Green)

Bloom Time:

Late Spring/Early Summer



Other details:

Drought-tolerant; suitable for xeriscaping

Suitable for growing in containers

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

Patent Information:


Propagation Methods:

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; germinate in a damp paper towel

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

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored


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

Carefree, Arizona

Bonsall, California

Vista, California

Gardeners' Notes:


On Oct 4, 2006, Porphyrostachys from Portland, OR (Zone 8b) wrote:

This Aloe is only known from Saudi Arabia and is not at all found in Somalia. Almost like a more green, solitary version of A. vera and with shiny, waxy yellow flowers. First described in 2000 and discovered by Sheila Collenette.


On Aug 22, 2006, palmbob from Acton, CA (Zone 8b) wrote:

Yemen/ Saudi aloe from higher elevations. Seedlings are heavily spotted, but adults appear spot-free. In my climate (inland southern California) this is a pretty slow growing species. It will be many years I think before I see it flower. Several authors (2010) feel that Aloe hijzensis is the same thing and ranges overlap in Yemen. This aloe is closely related to Aloe vacillans.


On Aug 21, 2006, thistlesifter from Vista, CA wrote:

Not much experience with the plant, as it is new in my collection. So far it is a pretty addition, though not large - young seedling.