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Alternanthera dentata 'Purple Knight'
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Description
Alternanthera dentata 'Purple Knight' is an annual plant valued for its striking deep purple foliage that adds vibrant colour and texture to gardens or containers throughout the growing season. It typically performs well as a bedding plant or in mixed borders where its dramatic leaves can provide an attractive contrast to other plants.
This variety prefers a sunny or partially shaded position with well-drained soil and can reach a height and spread of approximately 30 to 60 cm, making it a manageable and versatile choice. Though primarily grown for its foliage rather than flowers, it can produce small, insignificant flowers which rarely detract from its ornamental appeal.
Plant information
| Genus | Alternanthera |
|---|---|
| Species | dentata |
| Cultivar | Purple Knight |
| Plant type | Annual |
| Foliage | Deciduous |
| Height | 30-60 cm |
| Spread | 30-60 cm |
| Growth rate | Moderate |
| Hardiness | Half Hardy |
| Toxicity (Guide Only) | Unknown |
| Last listed | 2026-06-23 |
Position
Full SunPart Shade
Flower colour
Insignificant
Season of interest
SpringSummerAutumn
Features
Suitable for PotsLow Maintenance
Soil
Any SoilSandLoamWell DrainedNeutral