
Light Needs

Mature Height

Mature Spread

Growing Zones
Cape Cod Boys Siberian Iris, or Iris sibirica 'Cape Cod Boys' is a beachy, perennial Iris with upright, sky-blue flowers with fluid midnight blue veins and sunny yellow signals. This beardless ocean beauty grows in clumps of thin, vivid green, knife-point leaves that produce slender stems from 27 to 32 inches tall, each holding 2 to 5 blossoms that bloom in early summer and rebloom well into early fall. It is a vigorous plant that spreads from 18 to 24 inches.
Native to Europe and Asia, this award-winning Siberian Iris is a low-maintenance, colorful option for any budding gardener. It is deciduous in winter and attracts hummingbirds. One of its greatest appeals is its resistance to common diseases that plague other varieties of Iris.
Cape Cod Boys Siberian Iris Care
The Cape Cod Boys Siberian Iris prefers full sun, but can tolerate partial sun in hot areas. In order to thrive, it needs moist, well-drained soil that is slightly acidic. In a naturalized setting, they can be planted in areas with very moist to wet soil.
In colder areas, The Cape Cod Boys Siberian Iris should be planted in early spring to late summer. In milder areas, it is better to plant in the fall. This variety should be water liberally after planting until it is well-established. In the fall, prune away dead foliage.
Cape Cod Boys Siberian Iris Spacing
The Cape Cod Boys Siberian Iris should be spaced 1 to 2 feet apart. They are an excellent choice for rain gardens or around ponds, lakes, pools and stream sides. This variety is not affected by juglone, so they can be grown under Black Walnut Trees. Siberian Irises bloom before Japanese irises, but after tall bearded varieties.
Cape Cod Boys Siberian Iris Information
USDA Hardiness Zones: 3 - 8 |
Plant Type: Perennials |
Light Exposure: Full Sun (At Least 6 Hours Of Direct Sunlight) |
Mature Height: 27 - 32 Inches |
Mature Spread: 18 - 24 Inches |
Spacing: 18 - 24 Inches |
Habit: Clumping, Upright |
Flower Color(s): Blue, Yellow |
Flower Description: |
Bloom Period: Early Summer |
Foliage Type: Herbaceous |
Foliage Color(s): Green |
Foliage Description: |
Seasonal Interest: Summer Flowering |
Watering: Average |
Resists: Deer, Rabbit |
Tolerates: Heat |
Attracts: Hummingbirds |
Container Role: |
Uses: Wildlife Gardens |
Features: Attracts Pollinators, Low Maintenance |
Brand: |
Common Name: Cape Cod Boys Siberian Iris |
Other Name(s): |
Scientific Name: IRIS SIBIRICA `CAPE COD BOYS` |
- SKU:
- 1231013005-pc
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.

Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts

Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts

Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts

Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons

Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons

Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons

We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2025 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.

Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
Growing Zone | Estimated Ship Week |
---|---|
Zone 10 | March 31th |
Zone 9 | March 31st |
Zone 8 | April 7th |
Zone 7 | April 14th |
Zone 6b | April 21st |
Zone 6a | April 28th |
Zone 5b | May 5th |
Zone 5a | May 12th |
Zone 4 | May 19th |
Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: Idaho, AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!