General Plant Information (Edit)
Plant Habit: Tree
Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun
Plant Height: Up to 12-18 feet
Plant Spread: 3-4 feet
Leaves: Glaucous
Evergreen
Fruit: Dehiscent
Flowers: Showy
Other: Secund
Flower Color: Red
Yellow
Flower Time: Winter
Suitable Locations: Xeriscapic
Uses: Provides winter interest
Flowering Tree
Will Naturalize
Wildlife Attractant: Hummingbirds
Resistances: Drought tolerant
Propagation: Seeds: Can handle transplanting
Other info: Sow seeds in sandy soil. Seeds germinate in a few weeks at temperatures between 68 and 75 degrees F. Seedlings need moist but well-drained soil.
Propagation: Other methods: Cuttings: Stem
Offsets
Other: Stems cut below a node root easily. Cut a stem that has gotten leggy, let it dry out for at least a few hours to form a seal on the cut surface. Place the cutting in rooting medium kept moist, but not wet, until roots form.
Containers: Needs excellent drainage in pots
Miscellaneous: Tolerates poor soil
With thorns/spines/prickles/teeth
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern
Image
Common names
  • Flat-Flowered Aloe
  • Aloe
  • Mountain Aloe

Photo Gallery
Location: Coastal San Diego County 
Date: 2019-03-05
San Diego Zoo
Uploaded by peettee79
Location: Baja California
Date: 2013-02-04
Secund flowers
Location: Baja California
Date: 2019-03-07
Location: Baja California
Date: 2015-01-25
Location: South Bella Vista Drive, Tucson, AZ
Date: 2023-04-12
The first inflorescence on my aloe since planting the bareroot sp
Location:  1133 W Alameda St Tucson, AZ 85745 
Date: 2015-03-22
Beautfiul aloe in Menlo Park on the west side of Tucson
Location: South Bella Vista Drive, Tucson, AZ
Date: 2019-03-30
My newly planted, bare root Mountain Aloe. The horns on this smal
Location: Baja California
Date: 2015-02-12
Location: Baja California
Date: 2011-12-20
Location: San Diego Botanic Garden
Date: 2018-07-15
Location: Baja California
Date: 2017-02-12
Crested inflorescence resolving into branches
Location: Coastal San Diego County 
Date: 2019-03-05
San Diego Zoo
Location: Baja California
Date: 2016-01-17
Uploaded by peettee79
Location: San Marino
Date: 2014-06-06
Huntington Gardens

Date: 2019-04-20
Location: Baja California
Date: 2017-04-13
Aloe mite infestation
Location: Frankfurt Botanical Garden
Date: 2018-01-29
Location: Los Angeles Arboretum, Arcadia, California
Date: 2014-04-05
Location: Los Angeles Arboretum, Arcadia, California
Date: 2014-04-05
Plant with seed pods
Location: Baja California
Date: 2011-12-11
Location: Boyce Thompson Arboretum, AZ.
Date: 2014-05-18
Location: University of California Botanical Garden.
Date: March
photo by Stan Shebs

Date: 2011-01-17
Photo by Andrea Moro
Location: San Antonio Botanical Garden, San Antonio, Texas
Date: 2022-04-04
Location: Baja California
Date: 2023-04-11
Side view, young plant, still distichous

Date: 2014-02-03
Location: Baja California
Date: 2020-05-29
Inner ring measures 5 inches
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-03-19

Photo courtesy of Annie's Annuals and Perennials

Photo courtesy of Annie's Annuals and Perennials

Date: 2014-02-03

Date: 2014-02-03
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-03-19
Location: US Botanical Garden, Washington D.C.
Date: 2019-09-29
Mountain aloe (Aloe marlothii). Called Flat-flowered aloe also.

Photo courtesy of Annie's Annuals and Perennials
  • Uploaded by Joy

Photo courtesy of Annie's Annuals and Perennials
This plant is tagged in:
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Comments:
  • Posted by Baja_Costero (Baja California - Zone 11b) on Jan 20, 2016 3:08 PM concerning plant:
    Large single-stemmed tree aloe to 4-6m tall with outstanding secund flowers (mostly pointing one direction, up, rather than all around the flower stalk) on a multi branched inflorescence in winter. The racemes typically sweep sideways. One of the largest plants of this type, usually with lots of spines on the leaves. Easily confused with Aloe ferox, especially when small, but simple enough to tell apart once it flowers. Very tolerant of drought conditions and poor soil.

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