Description
Blue Flag Iris for Sale — Native Violet-Blue Blooms for Pond Margins and Water Gardens
If you’ve been searching for blue flag iris for sale, Quinn’s Fins grows Iris versicolor — commonly known as Blue Flag Iris, Northern Blue Flag, or Harlequin Blue Flag — right here in our on-site nursery greenhouse. This spectacular native pond marginal is one of the most beloved flowering plants in the water garden tradition, and for good reason. In late spring to early summer, branched stems rise 24 to 30 inches above clumps of elegant sword-shaped blue-green foliage, each stem bearing 3 to 5 flowers of remarkable complexity — broad violet-blue petals adorned with bold purple veining, a conspicuous white basal patch, and a vivid yellow blotch that together create one of the most intricate and beautiful flower faces in the pond plant world. Blue flag iris for sale at Quinn’s Fins arrives in a 2″ pot, nursery-grown and ready to bring native elegance to your pond margin or water garden.
Why Pond Keepers Choose Blue Flag Iris for Sale
Blue flag iris occupies a unique place in the pond plant catalog — a native North American wildflower that delivers the refined floral elegance of a cultivated garden iris with all the resilience and ecological value of a plant that has been thriving in northeastern wetlands for millennia.
- Spectacular violet-blue flowers with purple veining, white patches, and yellow blotches — among the most intricate flower faces of any pond marginal
- Hardy in Zones 3–9 — one of the most cold-hardy flowering pond marginals available
- Native to northeastern North America — supports local ecosystems, pollinators, and wetland biodiversity
- Host plant for moth and butterfly larvae — exceptional ecological value beyond simple pollinator attraction
- Attracts bees, butterflies, hummingbirds, ants, and beetles — outstanding multi-pollinator value
- Deer resistant — foliage is unpalatable to deer and other browsing herbivores
- Excellent cut flower — tall stems and stunning blooms make impressive arrangements
- Well-behaved spreader — less aggressive than many iris varieties; manageable in any size water garden
Growing Blue Flag Iris — Care at a Glance
Light
Blue flag iris performs best in full sun to part shade. Full sun produces the strongest growth and most prolific blooming. It tolerates part shade well — particularly in hotter climates (Zones 7–9) where afternoon shade extends the bloom period and prevents heat stress. Avoid deep shade, where flowering will be minimal.
Water & Soil
Plant blue flag iris in consistently moist to wet, acidic, humus-rich soil at the pond margin or in shallow water up to 4–6 inches deep. It adapts well to clay and mucky soils — conditions that challenge many other garden plants. Excellent for naturalizing along stream banks, pond shorelines, rain gardens, and stormwater basins. Apply a thin layer of mulch over the shallow rhizomes to prevent sunburn and moisture loss in garden border plantings. No supplemental fertilizer is needed in established pond settings — the plant draws sufficient nutrients directly from the water.
Hardiness & Overwintering
Blue flag iris is exceptionally cold hardy — rated for USDA Zones 3–9, tolerating temperatures well below zero. Established plants die back in winter and return reliably from the rhizome each spring. No special overwintering care is required in most climates. In Zones 7–9, foliage may remain semi-evergreen through mild winters.
Bloom & Post-Bloom Interest
Blue flag iris blooms in late spring to early summer, with each individual flower lasting several days. After flowering, attractive seed capsules develop that ripen to produce vivid orange berries — a food source for birds through fall and winter. Leave seed heads in place for maximum wildlife value, or deadhead if a tidier appearance is preferred.
Maintenance & Division
Divide established clumps every 2–3 years after flowering to maintain vigorous blooming and prevent congestion. Division is the most reliable way to keep blue flag iris flowering well year after year — undivided clumps that become crowded produce progressively fewer blooms. Replant divisions immediately in prepared moist soil or directly back into the pond margin.
Toxicity Note
The rhizomes of Iris versicolor contain irisin and related alkaloids and are toxic if ingested. Keep children and pets from consuming any part of the plant, particularly the rhizomes. The foliage is unpalatable to deer for the same reason. Do not confuse with edible iris species — Iris versicolor is not edible.
Nursery-Grown at Quinn’s Fins
Every blue flag iris for sale at Quinn’s Fins is grown right here in our on-site nursery greenhouse — not drop-shipped or bulk-sourced. Your plant arrives in a 2″ pot, rooted and healthy, ready for a smooth transition into your pond margin, rain garden, or moist landscape border. We grow what we sell.
For more on growing blue flag iris in ponds and water gardens, visit the Pond Informer’s Blue Flag Iris care guide or browse our full selection of pond and water garden plants at Quinn’s Fins.
Blue Flag Iris Plant Details
| Botanical Name | Iris versicolor |
| Common Names | Blue Flag Iris, Northern Blue Flag, Harlequin Blue Flag, Blue Iris |
| USDA Hardiness Zones | 3–9 |
| Mature Height | 24–30″ |
| Spread | 12–24″ |
| Flower Color | Violet-blue with purple veining, white basal patch, yellow blotch |
| Flowers Per Stem | 3–5 |
| Bloom Time | Late spring to early summer |
| Foliage | Upright, sword-shaped, blue-green |
| Pot Size | 2″ |
| Light | Full sun to part shade |
| Water Depth | Moist soil to 4–6″ deep |
| Soil | Acidic, humus-rich; tolerates clay and mucky soils |
| Deer Resistant | Yes |
| Toxicity | Rhizomes toxic — keep from children and pets |
| Wildlife Value | Bees, butterflies, hummingbirds, ants, beetles; moth and butterfly larval host |
| Native Range | Northeastern North America |
| Life Cycle | Hardy rhizomatous perennial |
| SKU | 6095 |
