Plant guide
Boab.
Adansonia gregorii
Pronounced a-dan-SO-nee-a gre-GOR-ee-eye
Also known as Australian baobab, Boab, baobab, baobab bottletree, baobab-tree, bottletree, cream-of-tartar-tree, dead-rat-tree
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone

The Boab is a fascinating tree native to Australia that is famous for its swollen, bottle shaped trunk. It stores water in its massive trunk to survive long periods of drought in its natural habitat. You will find it is a slow growing but long lived specimen that makes for a unique focal point.

At a glance
- Care level
- Moderate
- Plant type
- Deciduous tree
- Light
- Full sun
- Indoor light
- Direct sun
- Water
- Every 7 to 21 days
- Mature size
- 15 meters
- Growth rate
- Slow
- Hardiness
- USDA 10 to 12
- Bloom time
- Late spring to early summer
Care
Provide plenty of direct sunlight and ensure the soil drains very well to prevent root rot. Watch for soft or mushy stems which indicate too much moisture. Keep the plant dry during its winter dormancy period.
- Watering
- Water deeply during the growing season but allow the soil to dry out completely between waterings.
- Feeding
- Apply a balanced liquid fertilizer during the active growing season.
- Pruning
- Prune only to remove dead or crossing branches during the dormant season.
- Repotting
- Repot when the roots have filled the container, using a fast draining succulent mix.
- Soil
- Sandy, well draining soil
- Soil pH
- Neutral to slightly acidic
- Temperature
- 5 to 45°C
- Humidity
- 10 to 40%
- Drought tolerance
- High
- Lifespan
- Perennial, can live for centuries
- Fragrance
- Strong
- Deer and rabbits
- High
Signs it needs repotting
- Roots growing out of the drainage holes
- Water sitting on the surface for too long
- Growth has stalled significantly
Safety
- People
- The plant is not considered toxic to humans.
- Children
- The large, heavy fruit pods can be a hazard if they fall, so keep children away from the base of the tree during fruiting.
- Contact allergens
- The fuzzy coating on the fruit can cause mild skin irritation if handled without gloves.
- Airborne allergens
- Pollen may cause mild reactions in sensitive individuals during the flowering season.
- Edibility
- The fruit pulp is edible, but seeds should not be consumed raw as they are very hard and may pose a dental risk.
How to identify it
- Swollen bottle shaped trunk
- Deciduous during dry season
- Large white fragrant flowers
- Hard woody fruit capsules
- Palmately compound leaves
- Height
- 5 to 15m
- Spread
- 4 to 10m
- Leaves
- green, deciduous
- Flowers
- white, cream, 10 to 15cm
- Fruit
- brown, Late autumn
Problems to watch for
- Root rot · Occurs when the soil remains too wet for extended periods.
Check your boab from a photo
Pocket Botanist looks at a photo of your plant and tells you what's wrong and what to try first.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Growing it
- Propagation
- seed
- When to plant
- spring, early summer
- Overwintering
- Keep the plant completely dry and in a warm, frost-free location once it drops its leaves. Do not water until new growth appears in spring.
- In containers
- It grows well in large, deep containers with excellent drainage, though growth will be significantly slower than in the ground.
Seed
- 1. Scarify the hard seed coat with sandpaper.
- 2. Soak seeds in warm water for 24 hours.
- 3. Plant in a warm, sandy, well-draining medium.
Pair with other drought-tolerant Australian natives that require minimal soil disturbance.
Grows well with
- Spinifex · These grasses thrive in the same arid, well-drained conditions as the Boab.
Similar species
- African Baobab · It is a close relative but grows much larger and is native to Africa.
Science
- Family
- Malvaceae
- Genus
- Adansonia
- Order
- Malvales
- Class
- Magnoliopsida
- Native range
- Northwestern Australia
- Conservation
- It is not currently threatened, but wild collection of seeds should be done responsibly.
It survives in arid environments by shedding its leaves during the dry season to conserve moisture.
- Value to wildlife
- nectar source
- Pollinators
- bees, moths, beetles
- Uses
- ornamental specimen, traditional food source, shade tree
Through the year
Ecological indicators
- Salinity
- 2/9
- Soil reaction
- 6/9
- Light
- 9/9
- Temperature
- 8/9
- Moisture
- 2/9
- Nutrients
- 3/9
Taxonomy resolved against GBIF.
Questions people ask
- Can I grow a Boab in a pot?
- Yes, it makes a striking bonsai or container plant if kept in a very sunny, well-draining spot.
- How often should I water it?
- Water sparingly during the growing season and keep it almost completely dry during its winter dormancy.
Where the name comes from
The genus honors the French botanist Michel Adanson, while the species name gregorii commemorates the Australian explorer Augustus Gregory.
Good to know
- The trunk acts as a massive water reservoir during dry seasons.
- Boabs can live for over a thousand years.
- The flowers open at night to attract nocturnal pollinators.
- Indigenous Australians have used the tree for food, water, and medicine for generations.
Also in
Keep your boab growing
This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
This guide was generated with AI on and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.
