Blue Sedge is a cool-season, clump-forming sedge native to Mediterranean grasslands, marshes, and coastal areas that brings subtle sophistication to shady garden spaces. Growing 12, 18 inches tall and wide in hardiness zones 5, 9, this evergreen beauty features narrow, arching blue-green leaves with striking blue-gray undersides that catch the light beautifully. It thrives in partial shade to full shade and handles everything from consistently moist soils to standing water, making it exceptionally adaptable for rain gardens and moisture-prone areas. Even established plants tolerate drought once settled, and deer leave it untouched, freeing you from common garden frustrations.
Partial Shade
Moderate
5-9
18in H x 18in W
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Moderate
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The dual-toned foliage is genuinely arresting: blue-green topside with a contrasting blue-gray reverse that shows off whenever the leaves move or catch indirect light. It's equally at home in soggy rain gardens, average garden soils, or even standing water up to 2 inches deep, offering flexibility most ornamental grasses simply don't provide. The slow creeping habit keeps it well-behaved while the evergreen foliage persists through winter in milder climates, delivering year-round structure without the maintenance fuss of many grasses.
Blue Sedge excels in rain gardens where its tolerance for occasional standing water and heavy shade shine. It works beautifully as a specimen in shaded borders, tucked into woodland edges, or massed along streams and water features. Its low-growing, clumping habit also makes it suitable for softening hardscape edges in partial-shade settings where traditional grasses struggle.
No timeline data available yet for this variety.
Blue Sedge is typically sold as divisions or young plants rather than from seed. Transplant in spring or early autumn when soil is moist but not waterlogged. Space plants 12, 18 inches apart to account for their mature spread. Ensure the crown sits at or slightly above soil level to prevent rot.
In warm-winter climates where this sedge remains evergreen, minimal pruning is needed. In cold-winter climates, cut all foliage to the ground in late winter and remove the dead growth before new growth emerges.
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“Carex flacca originates from calcareous grasslands, marshes, sand dunes, and estuaries across southern Europe and North Africa, particularly around the Mediterranean. This sedge has grown wild in these regions for centuries, thriving in the challenging conditions where few other ornamentals flourish. The 'Blue Zinger' selection captures the species' most ornamental qualities, specifically emphasizing those striking blue tones that make it stand out even in shade.”