Acacia is a very beautiful ornamental tree that can grow very tall.
Planting, pruning and caring for it all contribute to helping acacia grow adequately.
Name – Acacia
Family – Fabaceae or Robinia
Category – ornamental tree
Height – 32 to 64 feet (10 to 20 m)
Exposure – Full sun
Soil type – any type of soil
Pruning – not required
Leafage – deciduous
Blooming – May to June
Avoid – Planting acacia in excessively chalky soil
Planting an Acacia tree
- See all our tips on how to plant your Acacia on our tree planting page.
Pruning isn’t required.
- If you must balance or reduce the branches, wait for the winter season or dry season in tropical countries.
Aside from this, remove dead branches regularly.
Good to know about the Acacia tree
The Acacia tree is part of the Fabaceae family, also called the legume family. It is native to North America.
- This tree species is known for its symmetrical leaves. They’re a bit long and divided into many oval leaflets.
Flowers bloom in hues that range from white to pink, depending on the species. Flowers grow in particularly fragrant clusters. It’s a true bounty for bees! Honey produced from Acacia trees is surprisingly clear and stays liquid for many months.
Acacia leaves close up a night, exactly like those of its tiny relative, Mimosa pudica.
- The scientific term for this is “nyctinasty”.
- There’s no consensus yet as to how this benefits these large trees. Some say it attracts hunting predators that eat leaf-eating herbivores. Others have shown that there may be a growth advantage. This means is helps plants grow faster with less nutrients and need for resources.
Different types of Acacia
“Acacia” is a name given to dozens of different types of trees. Among the most beautiful and easy to care for are the following:
- Another great summer shade tree: the catalpa tree
Smart tip about the Acacia tree
This tree usually has thorns at every leaf joint. It grows into a wide oval crown. Acacia is often used to top large mounds of soil, roadside embankments or long alignments in flat ranges.
Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Acacia tree path by Ly Thien Hoang ★ under ? CC BY 2.0
Black locust flowers by Anna Armbrust ★ under Pixabay license
Mimosa tree blooms by Elena Gemma ★ under Pixabay license
Silk tree flower by Tam Tam ★ under ? CC BY-SA 2.0
R. pseudoacacia ‘Umbraculifera’ green leaves by Tim Hite under ? CC BY 4.0
Acacia tree leaves by Marzena P. ★ under Pixabay license