Cross-berry

Grewia occidentalis

This tree that survives beginners.

Quick facts

Region

Widespread through the eastern half of the country and along the south coast, in bushveld, forest margins, coastal scrub and rocky hillsides from the Western Cape to Limpopo

Size

3m as a shrub, 4 to 8m as a small tree

Growth

Fast

Type

Deciduous to semi-deciduous, depending on winter cold

Hardiness

Handles frost, wind and drought once established

Soil type

Grows in most soils, including sand and clay, as long as water drains away

Greenpop Category

Reforestation

Greenpop Projects

Mistbelt Habitat Restoration Project, Garden Route Botanical Garden Forest Plot
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About this tree

The flowers come first and they keep coming. Mauve-pink, five-petalled, arranged into a distinct star with a boss of yellow stamens at the centre, they appear through spring and well into summer rather than in one short burst. Few indigenous plants of this size flower for as long.

Then the fruit takes over. Each berry is glossy red-brown and divided into four fused lobes, so depending on the angle it reads as a square or a cross. That is where cross-berry and kruisbessie come from. They are edible in the way that a small, dry, faintly sweet mouthful is edible, and generations of children have eaten them anyway.

For its size it does a lot of ecological work. Bees and butterflies take the flowers, the foliage feeds the larvae of several butterfly and moth species, and mousebirds, bulbuls, barbets and starlings strip the berries. Kudu, bushbuck and duiker browse it hard and it grows straight back. The dense scrambling habit gives small birds somewhere to nest.

The bark yields a strong fibre that has long been twisted into rope and used for binding and weaving, and it lathers in water as a soap and shampoo. The wood is springy and was favoured for bows, spear shafts and fishing rods. Several parts of the plant appear in traditional medicine, particularly around childbirth.

Growing guidelines

Full sun gives the most flowers. It will take light shade and flower less. Water while young, then treat it as drought hardy.

Pruning is the key to using it well. Left alone you get a scrambling shrub. Cut it back annually and you get a tidy small tree, or train it flat against a wall as an espalier. Fast, cheap and forgiving, it is one of the best starting points for a first indigenous garden and one of the best wildlife or security hedges available.

How we use this tree

We plant Cross-berry at our Mistbelt Habitat Restoration Project and the Garden Route Botanical Garden Forest Plot as a fast-growing, resilient addition to the understorey and forest margins, its tolerance for a wide range of soils and conditions makes it a reliable, low-maintenance choice across different site types. Its long flowering season and dense, scrambling habit bring sustained activity to a young forest, feeding bees and butterflies through spring and summer while giving small birds safe nesting cover well before the taller canopy species have matured.

Photos by David Becking (Tree SA), Trees SA, Wildflower Nursery, Plantbook (Glenice Ebedes)

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Phone: +27 76 803 5729
info@greenpop.org
Address: Opposite 107 Mountain Road, Woodstock Cape Town

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