Andropogon ternarius, commonly known as Splitbeard Bluestem, is a warm season clump forming grass known for its airy silvery seed heads and striking blue green summer foliage that transforms to purple and copper hues in fall. Its upright habit and drought resilience make it ideal for naturalized meadows, prairies, and low maintenance borders where movement and seasonal change are emphasized. Height & Spread: 24 - 36 in x 18 - 24 in Bloom Time: Late summer to fall Light Requirements: Full sun Soil Preference: Well drained sandy or average soils; tolerant of poor conditions Watering Needs: Low once established Deer Resistance: Rarely browsed due to coarse foliage texture Native Status Andropogon ternarius is native to the southeastern and south central United States, thriving in dry open woodlands, glades, and prairie edges. WILDLIFE & INSECTS Birds Provides autumn seed for small birds such as sparrows and finches; dense clumps offer winter shelter and nesting habitat. Butterflies Supports caterpillars of grass skippers like the Zabulon Skipper and Clouded Skipper especially in native prairie settings. Bees Offers habitat structure for solitary ground nesting bees beneath its base in undisturbed soils. Spacing & Landscape Use Spacing Recommendations: Space 18 - 24 in apart to allow upright form and autumn seed heads to fully express. Landscape Placement: Use in mass plantings in prairie restorations, dry meadows, and as vertical structure in pollinator gardens with seasonal movement. Companion Plants Eryngium yuccifolium (Rattlesnake Master) - Spiky texture and pale green bracts echo the wild prairie aesthetic while contrasting nicely with the fine blades of Splitbeard Bluestem. Schizachyrium scoparium (Little Bluestem) - Adds soft complementary texture and echoing blue tones, great for naturalistic plantings with Andropogon. Solidago rugosa 'Fireworks' - Explosive yellow plumes in late summer play off the silvery flower heads of Splitbeard Bluestem. Liatris spicata 'Kobold' - Vertical purple flower spikes offer height contrast and share similar bloom timing with Andropogon. Coreopsis lanceolata - Golden daisy like blooms bring color early in the season and blend into the dry landscape where Andropogon thrives.
