Photo by Melody

PlantFiles: Catclaw Acacia
Acacia roemeriana

Family: Mimosaceae
Genus: Acacia (a-KAY-see-uh) (Info)
Species: roemeriana (ro-mer-ee-AH-nuh) (Info)

2 members have or want this plant for trade.


15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)

15-20 ft. (4.7-6 m)

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:
White/Near White

Bloom Time:
Mid Spring


Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow after last frost
Scarify seed before sowing

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

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1 positive
2 neutrals
No negatives

Gardeners' Notes:

Positive Juttah On Nov 8, 2011, Juttah from Tucson, AZ (Zone 8a) wrote:

I bought this little tree by accident at a native plant sale because it has been mislabeled as Acacia occidentalis. I was going to return it, but the tree's attractive shape, spininess, and long distance back to the nursery made me change my mind.

The common name is Roundflower acacia or Roemer acacia. (Catclaw acacia = Acacia gregii.) This little tree has adapted so well it's turned into a medium-sized tree, more than doubling its size after less than 8 months in the ground.

The new growth is red and the unopened flowers look like little unripe raspberries. Its lightly fragrant flowers attract all kinds of native bees, but few honeybees.

The branches tend to grow out from the end; as a result our tree has developed lots of arching branches full of curved hooks that snag clothing. Don't plant this one near walkways. On the other hand, it would make a good barrier for that reason.

Neutral uglysteve On Nov 9, 2009, uglysteve from Apache Junction, AZ wrote:

Neutral frostweed On Aug 23, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Acacia roemeriana is Native to Texas and other States.


This plant has been said to grow in the following regions:

Apache Junction, Arizona
Tucson, Arizona
Hondo, Texas
San Antonio, Texas (2 reports)
Terlingua, Texas

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