Science · Plants, Natives & Crops
Black Wattle (Acacia)
Black wattle is an Australian tree widely planted for bark tannins, pulpwood and fuel. It favors moist, well-aerated soils but is strongly invasive in some regions, making legal status and containment central considerations before establishment.
Profile
- Origin
- Australia.
- Growth habit
- Evergreen tree, approximately 6–25 m tall in the Agroforestree profile.
- Soil
- Deep, well-drained, light-textured moist soils are preferred.
- Soil reaction
- Favors neutral to acidic soils; highly intolerant of alkaline and calcareous soils.
- Roots
- The species profile describes a superficial root system.
- Plantation form
- Crowded plantation trees tend to be more erect and slender than open-grown trees.
Water & soil context
- Moisture (VWC)
- No numeric root-zone volumetric water content target is specified in the cited publications.
- Salinity tolerance
- No numeric irrigation-water EC or soil-salinity threshold is specified. Intolerance of alkaline soils is not itself a quantified salinity limit.
- Drought tolerance
- The cited sources do not establish a universal drought threshold; suitable sites retain moisture while remaining well aerated.
Illustrative monitoring-depth band
6–12 in
Editorial placement example, not a validated optimum or total rooting depth. Confirm the site's root distribution and soil horizons; multiple depths may be needed.
Very wet conditions can increase pest and fungal-disease problems. Annual rainfall observations do not define irrigation volumes or moisture-sensor triggers.
Problems to watch
- Assess invasive-species restrictions and prevent unwanted spread.
- Nursery damping-off, white grubs and cutworms can impair establishment.
- Leaf-feeding beetles and branch-girdling insects can damage trees.
Stress signs
- Foliage loss can accompany leaf-feeding insects.
- Girdled twigs or branches indicate physical pest injury.
- The cited sources do not provide a validated water-stress symptom checklist.
Where you'll find it
- Tannin extraction from bark
- Pulpwood
- Fuelwood and charcoal
More plants, natives & crops
Published botanical and soil references are distinct from GroundWorx product guidance. Moisture thresholds and monitoring depths require site calibration; sources do not establish product performance or diagnose stress.