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The White Ironbark (Leucoxylon) has dark green foliage and inconspicuous red flowers, with an abuncance of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the winter, with fruit and seed production starting in the winter and continuing until fall. Leaves are retained year to year. The White Ironbark (Leucoxylon) has a long life span relative to most other plant species and a rapid growth rate. At maturity, the typical White Ironbark (Leucoxylon) will reach up to 50 feet high, with a maximum height at 20 years of 30 feet.
The White Ironbark (Leucoxylon) is usually not commercially available except under contract. It can be propagated by bare root, container, seed. It has a slow ability to spread through seed production and the seedlings have high vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below 22°F. has medium tolerance to drought and restricted water conditions.
| Category | |
|---|---|
| Growth Rate | Rapid |
| Growth Period | Spring, Summer, Fall |
| Lifespan | Long |
| Plant Nativity | Cultivated, or not in the U.S. |
| Commercial Availability | Contracting Only |
| Bloom Period | Winter |
|---|---|
| Displays Fall Colors | No |
| Shape/Growth Form | Single Stem |
| Drought Tolerance | Medium |
| Shade Tolerance | Intolerant |
| Height When Mature | 50 |
| Vegetative Spread | None |
| Flower Color | Red |
| Flower Conspicuousness | Yes |
| Fruit/Seed Abundance | High |
| Fruit/Seed Seasonality | Winter Fall |
| Seed Spread Rate | Slow |
| Propagations (Ways to Grow) | Bare Root, Container, Seed |
|---|---|
| Moisture Requirements | Medium |
| Cold Stratification Required | No |
| Minimum Temperature | 22 |
| Soil Depth for Roots | 20 |
| Toxic to Nearby Plants | Yes |
| Toxic to Livestock | No |
| After-Harvest Resprout Ability | Yes |
| Responds to Coppicing | Yes |
| pH Range | 6–8.5 pH |
|---|---|
| Precipitation Range | 20–20 inches/yr |
| Planting Density | 170–1200 indiv./acre |
| Soil Textures | Coarse, Fine, Medium |
| Soil Depth for Roots | 20 |
| Minimum Frost-Free Days | 180 day(s) |
| Salinity Tolerance | Medium |
| CaCO3 Tolerance | Medium |
| Leaf Retention | Yes |
|---|---|
| Palatability | Low |
| Fire Resistant | No |
| Causes Livestock Bloating | None |
Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA
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