Brazil nut.

At a glance

Care level

Difficult

Plant type

Tropical tree

Light

Full sun

Indoor light

Direct sun

Water

Every 3 to 7 days

Mature size

50 meters

Growth rate

Slow

Hardiness

USDA 11 to 12

Bloom time

Late spring to early summer

Care

This tree requires a tropical environment with high humidity and consistent warmth to thrive. Watch for leaf drop if temperatures dip too low or if the air becomes too dry. It is not suitable for indoor container gardening.

Watering

Keep the soil consistently moist but never waterlogged.

Feeding

Use a balanced fertilizer during the active growing season.

Pruning

Remove dead or damaged branches to maintain tree health.

Repotting

Repotting is generally not feasible once the tree reaches a significant size.

Soil

Deep, well-draining clay-rich soil

Soil pH

5.0 to 6.5

Temperature

15 to 35°C

Humidity

70 to 95%

Drought tolerance

Low

Lifespan

Perennial, typically 500 plus years

Fragrance

Strong

Deer and rabbits

Moderate

Safety

People

The tree itself is not toxic, but the heavy, woody fruit capsules can cause severe injury if they fall on someone.

Children

The massive, heavy fruit capsules pose a significant falling hazard to children playing beneath the canopy.

Contact allergens

The rough bark and large leaves do not typically cause skin irritation.

Airborne allergens

Pollen from the flowers may cause mild reactions in sensitive individuals.

Edibility

The seeds, known as Brazil nuts, contain high levels of selenium and should be consumed in moderation.

How to identify it

• Massive trunk with grey bark
• Large, leathery, alternate leaves
• Large, woody, spherical fruit capsules
• Creamy white, showy flowers

Height

30 to 50m

Spread

15 to 30m

Leaves

dark green, evergreen

Flowers

white, yellow, 3 to 5cm

Fruit

brown, Year round, peaking in rainy season

Problems to watch for

• Leaf SpotCommon
• Nut WeevilCommon
• Root RotUncommon
• Scale InsectsUncommon

Growing it

Propagation

seed

When to plant

spring, summer

Overwintering

Keep in a consistently warm, frost free environment with high humidity throughout the year.

In containers

Not suitable for containers due to its immense size and deep taproot requirements.

Plant shade tolerant tropical species beneath the canopy to mimic the natural forest structure.

Grows well with

• Rubber tree · They share the same native rainforest habitat and environmental needs.
• Cacao · Cacao thrives in the dappled shade provided by the massive canopy of the Brazil nut tree.

Similar species

• Monkey pot tree · It belongs to the same family and produces similar woody fruit capsules.

Science

Family

Lecythidaceae

Genus

Bertholletia

Order

Ericales

Class

Magnoliopsida

Native range

Amazon rainforest in South America

Conservation

This species is classified as vulnerable due to habitat loss and the lack of seedling recruitment in logged areas.

It relies on large bees for pollination and agoutis to disperse its seeds by burying them.

Value to wildlife

nectar source, habitat for canopy dwellers

Pollinators

bees

Uses

food source, timber, oil production

Taxonomy resolved against GBIF.

Questions people ask

Can I grow a Brazil nut tree in my backyard?

It is generally not possible as they require massive space and specific tropical conditions.

Why are they called Brazil nuts?

They were historically exported from Brazil, though they grow across the Amazon.

Where the name comes from

The genus honors French chemist Claude Louis Berthollet, while the species name excelsa refers to its towering height.

Good to know

• Brazil nuts are not actually nuts but seeds from a large, woody fruit.
• These trees can live for over 500 years in the Amazon rainforest.
• The fruit capsules are so hard they require specialized animals like agoutis to open them.
• They are one of the tallest trees in the Amazon basin.