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Common Names: Desert Cactus, African Candelabra Tree, Arabian Euphorbia
Family: Euphorbiaceae
Origin: Native to Saudi Arabia and Yemen, often found in hot, dry, rocky habitats
Growth Habit:
A large, upright, branching succulent tree that can grow up to 6–10 meters (20–30 feet) tall in the wild, though much smaller in pots.
Has a classic candelabra shape with multiple vertical arms.
Stems:
Thick, four- to five-angled vertical stems, often gray-green or blue-green with yellow variegation (especially in the popular Euphorbia ammak 'Variegata' cultivar).
Prominent toothed ridges along the stems give it a distinctive ribbed texture.
Spines:
Short, paired brown to reddish spines emerge along the ribs, spaced roughly every 1–2 cm. Spines are not as dangerous as cactus spines but still sharp.
Sap:
Like all Euphorbias, it contains milky white latex sap that is toxic and irritating to skin and eyes.
Appearance:
Produces small, yellow-green cyathia (euphorbia flowers) at the stem tips, often during warmer months.
Not particularly showy—grown primarily for its form and foliage.
Light:
Requires full sun to very bright light. Outdoors, plant in a sunny, exposed location. Indoors, place in the brightest possible spot—south- or west-facing windows are ideal.
Watering:
Water sparingly. Allow the soil to dry out completely between waterings.
Water even less in cooler months. Very drought-tolerant.
Soil:
Needs excellent drainage. Use a cactus or succulent mix with added pumice or sand.
Temperature:
Thrives in heat. Best in 20–35°C (68–95°F).
Frost-sensitive—protect from temperatures below 5°C (41°F).
Humidity:
Prefers dry air; avoid humid environments.
Feeding:
Fertilize sparingly—once in spring and once in summer with a diluted cactus fertilizer.
Propagation:
Propagated by stem cuttings, though handling requires care due to the toxic sap. Allow cuttings to callous over for several days before planting.
RequirementDetailsLightFull sun to very bright lightWaterOnly when soil is completely drySoilFast-draining cactus mixTemperature20–35°C preferred; protect from frostHumidityLow; prefers dry airFeedingTwice yearly during active growthPropagationCuttings (with caution—wear gloves)
Arid and Mediterranean-style landscapes
Architectural, sculptural indoor displays
Succulent collectors or xeriscapes
Container growing in sunny patios
Common Names: Desert Cactus, African Candelabra Tree, Arabian Euphorbia
Family: Euphorbiaceae
Origin: Native to Saudi Arabia and Yemen, often found in hot, dry, rocky habitats
Growth Habit:
A large, upright, branching succulent tree that can grow up to 6–10 meters (20–30 feet) tall in the wild, though much smaller in pots.
Has a classic candelabra shape with multiple vertical arms.
Stems:
Thick, four- to five-angled vertical stems, often gray-green or blue-green with yellow variegation (especially in the popular Euphorbia ammak 'Variegata' cultivar).
Prominent toothed ridges along the stems give it a distinctive ribbed texture.
Spines:
Short, paired brown to reddish spines emerge along the ribs, spaced roughly every 1–2 cm. Spines are not as dangerous as cactus spines but still sharp.
Sap:
Like all Euphorbias, it contains milky white latex sap that is toxic and irritating to skin and eyes.
Appearance:
Produces small, yellow-green cyathia (euphorbia flowers) at the stem tips, often during warmer months.
Not particularly showy—grown primarily for its form and foliage.
Light:
Requires full sun to very bright light. Outdoors, plant in a sunny, exposed location. Indoors, place in the brightest possible spot—south- or west-facing windows are ideal.
Watering:
Water sparingly. Allow the soil to dry out completely between waterings.
Water even less in cooler months. Very drought-tolerant.
Soil:
Needs excellent drainage. Use a cactus or succulent mix with added pumice or sand.
Temperature:
Thrives in heat. Best in 20–35°C (68–95°F).
Frost-sensitive—protect from temperatures below 5°C (41°F).
Humidity:
Prefers dry air; avoid humid environments.
Feeding:
Fertilize sparingly—once in spring and once in summer with a diluted cactus fertilizer.
Propagation:
Propagated by stem cuttings, though handling requires care due to the toxic sap. Allow cuttings to callous over for several days before planting.
RequirementDetailsLightFull sun to very bright lightWaterOnly when soil is completely drySoilFast-draining cactus mixTemperature20–35°C preferred; protect from frostHumidityLow; prefers dry airFeedingTwice yearly during active growthPropagationCuttings (with caution—wear gloves)
Arid and Mediterranean-style landscapes
Architectural, sculptural indoor displays
Succulent collectors or xeriscapes
Container growing in sunny patios