‘Purple Knight’ Calico Plant (Alternanthera dentata ‘Purple Knight’): Deep Purple Foliage for Heat-Loving Beds

‘Purple Knight’ calico plant (Alternanthera dentata ‘Purple Knight’) is a tropical foliage star with purple-ruby leaves so dark they appear nearly black. Color deepens in high heat. It spreads through beds, borders, or containers, providing bold contrast to bright flowers. Use as edging, annual groundcover, or in formal knot gardens.

Growing Tips

• Plant after frost in moist, well-drained soil.
• Light: Full sun for best color; tolerates partial shade.
• Pinch back to maintain compact form.

Propagation & Problems

Sow seed at 55–64°F when ripe or in spring; divide in spring; take cuttings in late summer. Generally trouble-free, but spider mites and Fusarium wilt may occur.

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