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Product Description
Dark & Bold
The Alternanthera Purple Knight has some of the darkest foliage found in any plant species.
Alternanthera (Alternanthera Purple Knight)
The foliage of the Alternanthera actually gets darker and more beautiful the hotter it gets! This heat loving annual is easily established from Alternanthera seeds. Purple Knight makes a nice impact in the flowering annual garden bed, and is also great for pots on the patio, or a beautiful hanging basket.
Alternanthera is one of the finest foliage plants around for the sunny to lightly shaded garden, and 'Purple Knight' is by far the best of the spreaders! It has a purple cast that actually deepens with exposure to heat, and the deep purple foliage offers a great contrast to flowering plants and various green foliage.
Purple Knight Alternanthera establishes nicely from flower seed, and it quickly reaches just 16 - 20 inches tall and spreads up to 3 feet wide. Marvelously heat tolerant, Alternanthera plants reach their deepest, richest tones in full sun, but will turn an interesting burgundy-bronze in partial shade.
Alternanthera Seeds | Purple Knight
How to Grow
To grow your Alternanthera Indoors, grow in loam-based potting compost (No. 2) in full light. In the growing season, water freely and apply a balanced liquid fertilizer monthly. In winter, water sparingly and keep well ventilated.
If growing outdoors, plant out after any risk of frost has passed. Grow in moist, but well-drained soil, and in full sun for best leaf color, or in partial shade. Clip over to maintain compactness.
The Purple Knight grows in a ground-hugging manner. It blends into the garden well, but pairing it with some coarser or finer plants would make it even more striking.
Flower Specifications
- Sowing Rate: 3 - 4 seeds per plant
- Depth: Do not cover
- Plant Spacing: 18 - 24 inches
- Average Germ Time: 3 - 14 days
- Moisture: Keep seeds moist until germination
- Height: 16 - 20 inches
- USDA Zones: 7 - 10
- Season: Annual
Outdoor or Indoor?
In addition to being splendid in the garden, the Alternanthera makes a great houseplant as well!
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This Item  Outsidepride Alternanthera Purple Knight Garden Shrub Plant Seeds - 20 Seeds |  |  |  | |
| Price | $7.49 | $7.49 | $7.49 | $3.59 |
| Delivery | — | Get it as soon as Wednesday, May 8 | — | Get it May 8 - 10 |
| Customer Ratings | ||||
| Sold By | Outsidepride | Outsidepride | Outsidepride | Gaea's Blessing |
| type | Flower | Flower | Flower | Flowers |
| number of pieces | 20 | 1000 | 1000 | — |
| sunlight exposure | Full Sun | Full Sun | Full Sun | Full Sun |
| usda hardiness zone | 7 | 5 | 3 | — |
| blooming period | Summer | Spring to Fall | Spring to Fall | spring,summer |
| planting period | — | Spring | Spring | — |
| soil type | Loam Soil | Clay Soil | Loam Soil | — |
| expected height | — | 8 inches | 12 inches | — |
| moisture needs | Moderate Watering | Moderate Watering | Little To No Watering | Moderate Watering |
