Does it need much water?

No, it is highly drought tolerant and prefers to dry out between waterings.

Can I grow it indoors?

It is difficult to keep indoors due to its size and need for intense, direct sunlight.

Plant guide

Gum arabic tree.

Senegalia senegal

Pronounced sen-eh-GAY-lee-ah SEN-eh-gal

Also known as Gum Acacia, Gum Arabic, Gum Arabic Tree, Senegal-gum, Sudan Gum, Sudan gum-arabic, Three thorned senegalia

Senegalia senegal — Photo by dune_ninja (CC0) via gbif

The gum arabic tree is a hardy, drought tolerant shrub or small tree native to arid regions. It is famous for producing the sap known as gum arabic, which has been used for centuries in food and art. You will find it thrives in hot, sunny environments with very little water.

Another photo of Gum arabic tree — Photo by Denis Bastianelli (CC BY) via iNaturalist

At a glance

Care level: Easy
Plant type: Deciduous shrub or tree
Light: Full sun
Indoor light: Direct sun
Water: Every 14 to 30 days
Mature size: 15 to 20 feet
Growth rate: Slow
Hardiness: USDA 9 to 12
Bloom time: Late spring to early summer

Care

Keep this plant in a spot with intense, direct sunlight to mimic its natural desert home. Watch for yellowing leaves or leaf drop, which often signal that the soil is staying too wet for too long. It is very sensitive to overwatering, so always let the soil dry out completely between drinks.

Watering: Allow the soil to dry out entirely between waterings to prevent root rot.
Feeding: Apply a balanced, slow release fertilizer sparingly during the active growing season.
Pruning: Prune lightly in late winter to maintain shape and remove any dead or crossing branches.
Repotting: Repot only when the roots have clearly filled the container, as this plant prefers to be slightly root bound.
Soil: Sandy or rocky well draining soil
Soil pH: 6.0 to 8.5
Temperature: 5 to 45°C
Humidity: 10 to 40%
Drought tolerance: High
Lifespan: Long-lived perennial, often 30 to 50 years.
Fragrance: Light
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes.
Water sitting on the surface for too long.
Stunted growth during the active season.

Safety

People: The plant is generally non-toxic, though the sharp thorns pose a significant physical injury risk.
Children: Keep children away from the branches because the hooked thorns are extremely sharp and can cause deep cuts.
Contact allergens: The sharp, hooked thorns can cause painful skin punctures and scratches.
Airborne allergens: The pollen can trigger mild allergic reactions in sensitive individuals during the flowering season.
Edibility: The gum arabic harvested from the tree is edible, but raw seeds should be avoided as they may contain anti-nutrients.

How to identify it

Small, feathery bipinnate leaves
Hooked thorns in pairs or threes
Creamy white cylindrical flower spikes
Flat, papery brown seed pods

Height: 2 to 6m
Spread: 2 to 5m
Leaves: green, gray-green, deciduous
Flowers: cream, white, 1 to 2cm
Fruit: brown, Late autumn

Problems to watch for

Root RotCommon
Scale InsectsCommon
Sooty MoldUncommon
Spider MitesUncommon

By symptom

Plant problems by symptom

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Growing it

Propagation: seed, cuttings
When to plant: Spring
Overwintering: Move the plant to a frost-free location if temperatures drop near freezing. Reduce watering significantly during the winter dormancy period.
In containers: It can be grown in large containers with excellent drainage, but it will eventually outgrow most indoor spaces.

Seed Scarification

1. Nick the hard seed coat with a file.
2. Soak seeds in warm water for 24 hours.
3. Plant in well-draining sandy soil.

Group this tree with other drought-tolerant species that do not require frequent irrigation to prevent root rot.

Grows well with

Desert Rose · They share similar requirements for high heat and low water.
Aloe · These succulents thrive in the same arid, sunny conditions.

Similar species

Acacia nilotica · Shares a similar growth habit and thorny appearance.

Science

Family: Fabaceae
Genus: Senegalia
Order: Fabales
Class: Magnoliopsida
Native range: Sub-Saharan Africa, Oman, and Pakistan.
Conservation: It is not currently listed as endangered, but wild harvesting of gum must be managed to prevent over-exploitation.

It survives in harsh, arid environments by shedding its leaves during extreme drought to conserve moisture.

Value to wildlife: nectar source, habitat for birds
Pollinators: bees, butterflies
Uses: gum arabic production, xeriscaping, soil stabilization, fodder

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 4/9
Soil reaction: 7/9
Light: 9/9
Temperature: 8/9
Moisture: 2/9
Nutrients: 2/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need much water?: No, it is highly drought tolerant and prefers to dry out between waterings.
Can I grow it indoors?: It is difficult to keep indoors due to its size and need for intense, direct sunlight.

Where the name comes from

The name Senegalia refers to its prevalence in the Senegal region, while the specific epithet senegal confirms this origin.

Good to know

The gum is harvested by making small incisions in the bark.
It is incredibly drought tolerant and thrives in arid desert conditions.
The wood is very hard and durable, often used for tool handles.
It fixes nitrogen in the soil, helping nearby plants grow better.

Also in

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.