Pentaclethra macrophylla: complete guide

Overview

Pentaclethra macrophylla, known as Atta-bean, Oilbean tree or African oil bean, is an impressive tropical tree from West Africa. This tree from the Fabaceae (legume family) grows naturally in West and Central Africa, from Senegal to Angola.

The tree is particularly known for its large oil-rich seeds that are used in traditional African cuisine and cosmetics. The seeds contain valuable oils and proteins. For gardeners, this tree is interesting because of its impressive appearance and useful properties.

Appearance and bloom

Pentaclethra macrophylla is a large tree that can reach up to 100 feet (30 meters) in its natural habitat. The tree has large, compound leaves made up of many small leaflets. The leaves can be up to 3 feet (1 meter) long and give the tree a regal appearance.

The flowers are small and inconspicuous, but appear in rich clusters. The fruit is a long pod with large, oil-rich seeds. The seeds are oval and reddish to brown in color.

Ideal location

Pentaclethra macrophylla thrives best in full sunlight. The tree needs at least 6 hours of direct sunlight per day. In natural habitat, the tree often grows in partial shade under other trees, but in nursery conditions full sun is ideal.

The tree needs plenty of space for its crown growth. Provide a location where it can grow unobstructed. Wind can damage the large leaves, so shelter is desirable.

Soil

Pentaclethra macrophylla grows best in rich, well-draining soil. The tree prefers nutrient-rich soil with plenty of organic matter. Heavy clay soils should be improved with sand and compost.

The tree tolerates acidic to neutral soils (pH 5.5-7.0). In very poor soils, the tree grows more slowly and produces less yield.

Watering

Water Pentaclethra macrophylla regularly during the growing season. The tree prefers moist soil, but not waterlogged. In tropical regions with heavy rainfall, the tree grows under natural conditions.

During dry periods, supplementary water must be given. Young trees need more moisture control than mature trees. Mulching around the tree helps retain moisture.

Pruning

Pruning is needed for young trees to promote good tree shape. Remove competing stems and weak branches. Once mature, the tree rarely needs further pruning.

Remove dead and diseased branches immediately. This helps prevent diseases.

Maintenance calendar

Spring: Examine tree structure. Prune competing stems. Start feeding as growth period begins.

Summer: Regular watering. Feed as needed. Monitor for diseases.

Autumn: Adjust watering to rainfall. Reduce feeding.

Winter: Minimal watering in dry regions. No feeding during dormancy.

Winter hardiness

Pentaclethra macrophylla is not frost-hardy and cannot tolerate frost. The tree grows only in tropical and subtropical climates. Temperatures below 41 F (5 C) damage the tree.

In temperate climates, the tree can only be grown in a greenhouse or conservatory.

Special characteristics

The seeds of Pentaclethra macrophylla are extremely nutritious and are widely used in West Africa. The oil is suitable for food and cosmetics. The seeds also contain valuable proteins.

The tree also plays an important ecological role in West African ecosystems. Many animals rely on the seed for food.

Plant combinations

Pentaclethra macrophylla can be grown as a single tree because of its impressive growth. In tropical gardens, it can be grown together with other fruit trees and useful trees.

The large leaves provide shade under other trees, so place other shade-tolerant plants underneath.

Closing thoughts

Pentaclethra macrophylla is an impressive and useful tree for tropical and subtropical gardens. With its large leaves and nutritious seeds, it is a valuable addition to permaculture systems and farm gardens.

Want more information about tropical fruit trees and useful plants? Visit gardenworld.app for more guides and ideas.