Iris cristata (Dwarf Crested Iris)
Iris cristata (Dwarf Crested Iris) is a low-growing perennial forming a quickly spreading mat of narrow, sword-shaped, bright green, pointed leaves. Myriads of small, light violet-blue flowers, up to 1.5 in. across (4 cm), adorned with a conspicuous white splotch and gold crest on each fall, appear in mid-spring, just above the foliage tips in perfect display.
Iris cristata (Dwarf Crested Iris) is a low-growing perennial forming a quickly spreading mat of narrow, sword-shaped, bright green, pointed leaves. Myriads of small, light violet-blue flowers, up to 1.5 in. across (4 cm), adorned with a conspicuous white splotch and gold crest on each fall, appear in mid-spring, just above the foliage tips in perfect display. They carpet the ground and create a spectacular drift of blue color. This rhizomatous perennial is an excellent plant for the shaded rock garden, perennial border, or woodland garden. May also be used as a seasonal ground cover.
- Grows up to 6-9 in. tall (15-22 cm) and 6-12 in. wide (15-30 cm). Spreads quickly to form dense colonies in satisfactory growing conditions.
- Performs best in light shade in moist, humus-rich soils. Plants will tolerate some sun if the soil is consistently moist. Blooms well even in dry shade.
- A welcomed addition to beds and borders, wall-side borders, coastal gardens, city gardens, cottage gardens, rock gardens, or containers.
- Deer resistant.
- No serious insect or disease issues but watch for slugs and snails.
- Remove any dying foliage in autumn, old flower stems can be cut down after flowering.
- Propagate by division of rhizomes from midsummer to early autumn
- 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 southeastern United States.
Requirements
Hardiness | 4 – 10 |
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Heat Zones | 1 – 10 |
Climate Zones | 2, 2B, 3, 4, 5, 6 |
Plant Type | Perennials |
Plant Family | Iris – Other |
Exposure | Partial Sun |
Season of Interest | Spring (Mid) |
Height | 6" – 9" (15cm – 22cm) |
Spread | 6" – 1' (15cm – 30cm) |
Spacing | 6″ – 12″ (15cm – 30cm) |
Water Needs | Low, Average |
Maintenance | Low |
Soil Type | Clay, Loam |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained, Moisture Retentive, Well-Drained |
Characteristics | Showy |
Native Plants | United States, Midwest, Illinois, Indiana, Missouri, Ohio, Northeast, Massachusetts, Maryland, Pennsylvania, Southeast, Alabama, Arkansas, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma |
Tolerance | Deer, Drought, Dry Soil |
Garden Uses | Beds and Borders, Ground Covers, Patio and Containers, Wall-Side Borders |
Garden Styles | City and Courtyard, Coastal Garden, Gravel and Rock Garden, Informal and Cottage |