
Iris x hollandica 'Delft Blue'
Dutch Iris 'Delft Blue'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
22 inches
Width
6 inches
Light
Full Sun, Partial Sun
Zones
5, 6, 7, 8, 9
Water
Average moisture during growth; keep dry when dormant
Humidity
Prefers dry to moderate humidity
Lifespan
Perennial
Native To
Garden origin
Toxicity
All parts are toxic if ingested; can cause skin irritation.
The Story
Plant Bio
Iris x hollandica, or Dutch Iris, are bulbous perennials resulting from complex crosses of several iris species. They are prized for their elegant, orchid-like flowers on tall, slender stems, making them exceptional cut flowers. Named after the famous Dutch pottery, 'Delft Blue' features flowers with light blue standards and deep violet-blue falls, each marked with a striking yellow-orange blotch. The flowers are borne on sturdy stems, ideal for cutting.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
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Planting
How to Grow
- Tuck bulbs 4-6 inches deep in well-draining soil in early fall.
- Water thoroughly after planting to settle soil around bulbs.
- Thin out overcrowded clumps after foliage dies back, typically every 3-4 years.
- Divide and replant in late summer or early fall for best results.
- Mulch lightly to retain moisture and suppress weeds during growing season.
- Monitor for pests and diseases, and remove any affected foliage promptly.
Pro Tip
Plant in full sun for vibrant blooms and ensure excellent drainage to prevent bulb rot.
Keep It Thriving
Care Guide
Do
- Water during dry spells in growing season 💧
- Apply a balanced fertilizer in early spring 🌱
- Remove spent flowers to encourage healthy foliage
- Mulch to conserve moisture and regulate soil temperature
Don't
- Never plant in poorly drained soil ❌
- Avoid overwatering in winter ❌
- Don’t ignore pest signs or disease symptoms
- Refrain from cutting back foliage prematurely
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Harvest | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know