Acacia cognata

river wattle
Small weeping tree with upright posture and evergreen thready foliage. Light, fragrant buff bloom in winter. Not so drought-tolerant as other acacias.
Acacia cognataAcacia cognata
height 15–20ft
width 10–15ft
tolerates Moist Soil, Pots, Wind
For the first three years after it’s planted, this acacia should be watered deeply but infrequently (when the top three inches of soil or so have dried). After that, it will look best with occasional deep waterings every couple weeks to a month. Use drippers, emitters or a slow stream of water so that it doesn’t run off; allow the water to trickle all the way down through the deepest layers of soil.

A great trick for watering street trees is to drill a 1/8-inch hole on the bottom edge of a 5-gallon bucket, then set the bucket with the hole aligned next to the tree and fill the bucket with water. Fill once for a 1-5 gallon plant, fill twice for a 7-15 gallon plant, three times for 25g or larger plants.

Though these trees are drought tolerant, never let them go bone dry in a pot.
exposure Full Sun
drainage In Ground: Cactus Mix, In Pots: Cactus Mix, Tolerates Heavy Soil, Tolerates Sandy Soil
fertilizing All Purpose, Low Needs
origin Australia
9, 14–24, H2

Sunset Zones Map

Outdoor Exposure Guide


Full Sun
Six or more hours of sun beams directly landing on the plant's leaves.

Part Shade
Three to five hours of sun beams directly landing on the plant's leaves.

Part Sun
One to two hours of sun beams directly landing on the plants leaves.

Full Shade
The plant is never fully lit by sun beams, but is in a bright spot or has dappled sunbeams playing over the leaves throughout the day.

Deep Shade
The plant never has dappled light on the leaves, and is in a place that feels dim, even on a nice sunny day.


Growing Notes

Acacia are FAST growers - this plant will reach full size in under five years making it a great choice for privacy needs in your garden. Acacia are also relatively short lived, typically growing for twenty to thirty years. This combination can be used to your advantage by planting longer lived slower growing plants near your acacia
Acacia do well in pots, which effectively “dwarf” them.
In some shade, acacia this acacia’s foliage will be bright spring green, and the branches will have a weeping form. In full hot sun the foliage may get a bronze tint.
This tree is forgiving of pruning. Choose to prune off lower branches for a standard tree form, or tip prune to create a dense shrub or screen. We’re seen acacia cognota uses as a billowy casual hedge.

Special Interest

If you’d like to see a lovely Acacia cognata look no further than the street tree in front of our San Francisco store!