We have been purchasing our bulbs from A.D.R. for many years now. As a contractor, the process to order bulbs for many different clients is easy and seamless. The website is a wonderful tool that we refer to quite often for product information, photos, and combination ideas. Our bulbs always arrive on time and wonderfully organized to make our installation much more efficient . The product is top notch and leaves our customers with wanting more and more each season.
Ashley Marrin
, Bret-Mar Landscape
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Iris × robusta 'Gerald Darby' is a vigorous, moisture-loving perennial with narrow, sword-shaped green leaves that emerge with a striking purple flush in spring before maturing to green. In late spring to early summer, purplish-black stems rise above the foliage, bearing violet-blue flowers with deep yellow signals on mostly white falls. Thriving in full sun to part shade, this adaptable iris prefers medium to wet soils and can be grown in shallow standing water, making it ideal for pond edges, water gardens, and moist borders.
| Description | Price | |||
|---|---|---|---|---|
| Bundle of 25 tags | $2.50 | |||
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| Bulk Box of 25 Roots, Size #1 Div | $63.50 | |||
Get Notified When Back In StockComplete this form and we'll notify you when SKU SBIN55409001 is restocked. | ||||
Planting: Plant rhizomes in spring or fall, 2 to 3 inches deep and 12 to 18 inches apart. Set the crown just at or slightly below soil level.
Location: Full sun to partial shade. Thrives in wet soils—ideal for pond edges, rain gardens, or consistently moist borders.
Soil: Rich, loamy, moisture-retentive soil with a slightly acidic to neutral pH (6.0–7.5). Tolerates shallow standing water.
Watering: Keep soil consistently moist. Mulch helps retain moisture when planted away from water features.
Temperature: Hardy in USDA zones 2–7. Cold-tolerant and well-suited to northern climates.
Fertilization: Apply compost in spring. A balanced, slow-release fertilizer (e.g., 10-10-10) can be added in early spring and midsummer.
Pruning: Remove spent flower stalks and yellowing foliage. Cut back to the ground in late fall or early spring.
Propagation: Divide clumps every 3 to 4 years in late summer to control spread and maintain vigor.
| Height | 28 Inches |
| Spread | 18-24 Inches |
| Spacing | 24-30 Inches |
| Hardiness Zone | 3-9 |
| Color |
Purple |
49 Black Meadow Rd
Chester, NY 10918 USA
Phone: (800) 990-9934
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