A southern wetland species, Iris virginica (Southern Blue Flag) is a rhizomatous perennial forming a dense and impressive clump of sword-shaped, bright green leaves that often lie on the ground or water. Tall stems rise from the clump in late spring to early summer, each of them boasting 2-3 violet-blue flowers, 3 in. across (7 cm). The falls feature a conspicuously veined white basal patch and a yellow blotch. The blossoms give way to fat green pods, about 2 in. long (5 cm). Very handsome, Southern Blue Flag is a central landscape plant for the water garden, near ponds and streams. This aquatic plant is also a lovely addition to moist borders.

• Grows up to 24-36 in. tall and wide (60-90 cm). Clumps will slowly spread by creeping rhizomes to form colonies.
• Performs best in full sun in acidic, wet soils. This iris may be grown in up to 6 in. (15 cm) of shallow standing water. Appreciates some afternoon shade in hot summer areas.
• A welcomed addition for lily pools, bog gardens, rain gardens, naturalized in wetlands or along streams or ponds. May be grown in borders provided the soil is always kept moist.
• Propagate by division in early fall when the leaves begin to turn yellow. If propagation is to be made by seed, sow when seeds are ripe (not stored dry).
• Virtually pest and disease free. Deer resistant.
• All parts may cause discomfort if ingested. Wear gloves and other protective equipment when handling.
• Toxic to dogs, toxic to cats, toxic to horses.
• Native to the coastal plains from Virginia to Texas.