Bring dependable color to wet spots with Iris versicolor (Blue Flag Iris), a native perennial prized for its showy violet-blue flowers in late spring to early summer and its upright, blue-green, sword-like foliage. You can use it to naturalize along pond edges, in rain gardens, swales, or any consistently moist area where many ornamentals struggle.

Plant it in full sun for the best bloom, but it also performs well in part shade. Give it soil that stays evenly moist to wet; it can handle occasional flooding and even shallow, seasonal standing water once established. Space clumps to allow air movement, and mulch lightly to help conserve moisture and reduce temperature swings around the roots.

After flowering, the foliage continues to provide strong vertical texture. You can remove spent flower stalks for a tidier look, but let the leaves remain through the growing season to feed the rhizomes. Divide crowded clumps every few years to refresh vigor and keep plants flowering well; replant divisions promptly and water them in thoroughly.

This iris is a great companion for other moisture-loving natives and perennials. With mature height around 24-36 inches, place it mid-border or at the waterline where the blooms can be enjoyed up close. Like many irises, it is not for eating, so site it where pets and children are less likely to nibble.

Specifications

• Cold hardiness zone: 3-9 (-40 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Moderate
• Mature height: 24-36"
• Spread: 18-24"
• Tolerant of: Deer, Wet Conditions

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