Longspike Tridens is a native Missouri grass that brings prairie elegance to full-sun gardens across zones 5 through 9. This densely tufted perennial grows 3 to 4 feet tall with fine, narrow blades and produces distinctive spike-like flower panicles that emerge in mid-July and persist into October, shifting from brownish tones to rose-purplish hues. It thrives on drought and poor soils where other ornamentals struggle, making it a low-maintenance choice for naturalized landscapes and erosion control.
Full Sun
Moderate
5-9
48in H x 30in W
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Moderate
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The slender, spike-like flower panicles stretch 4 to 12 inches long and hold their color through fall, creating visual interest months after bloom. Longspike Tridens handles both wet prairie conditions and bone-dry clay soils with equal poise, tolerating drought, heavy soil, black walnut toxicity, and urban stresses that would defeat fussier grasses. Its Missouri native heritage means it evolved for the exact growing conditions that challenge many landscape plants, thriving where conventional ornamentals falter.
Longspike Tridens shines in naturalized plantings, prairie restorations, and native plant landscapes where its tall, architectural flower spikes add late-season structure. Its tolerance for erosion-prone slopes, compacted urban soils, and roadside conditions makes it valuable for habitat restoration and low-input landscape design.
No timeline data available yet for this variety.
Cut Longspike Tridens to the ground in late winter before new growth appears to remove last season's dead foliage and allow fresh shoots to emerge cleanly.
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“Longspike Tridens is a Missouri native grass that occurs naturally across both moist and dry soils on open ground, prairies, fields, waste areas, ditches, and roadsides in the far southern part of the state. Its presence in these varied, often disturbed habitats speaks to its resilience and adaptability. The common name references the distinctive spike-like panicles that have made this native species valuable to prairie restoration and native plant gardening movements seeking authentic regional flora.”