Product Description
Iris sibirica 'Cape Cod Boys' (25) Bare Root Plants
Common Name: Common Name: Siberian Iris
Just like the famous shore community of Cape Cod, this Siberian Iris will make you think of beaches and the ocean. Periwinkle blue flowers have darker blue veining that intensifies into a defined pattern at the end of the petals. Prominent clear lemon-yellow signals complete the look. This variety blooms for a long time. When it is not flowering, the attractive, wide blue-green leaf blades will catch your eye.
Siberian irises are haled for their elegant, delicate flowers and disease resistance. They perform admirably in the sunny to partially shady garden but need plenty of water throughout the season to continue looking their best. In naturalized settings, they are particularly effective around water features. They can also be grown under Black Walnut trees since they are not affected by juglone. Siberian Irises bloom before Japanese Irises but after Tall Bearded Irises.
Siberian Irises are among the easiest and most trouble-free species to grow in their genus. They prefer full sun, though they will tolerate part shade especially in warmer zones. Plant in rich, moist soil that is moderately acidic (5.2-6.4). Deadheading this variety will not prolong its bloom.
It is best to leave these irises untouched until there is a notable lessening of blooms. At that time, they may be divided, preferably in the fall but also in the spring. New clumps may take two or three years to become firmly established, at which time they will begin to bloom profusely. According to Steven Still, Siberian Irises are the best species of Iris for the south.
Height: 27.0-32.0 Inches
Spread: 18.0-24.0 Inches
Hardiness Zones: 3,4,5,6,7,8,9
Flower Color: Blue Shades
Foliage Color: Green shades
Sunlight: Full Sun (> 6 hrs. Direct Sun) - Part Shade (4-6 hrs. Direct Sun)
Average to Consistent Water Needs
Average Soil Quality
Bloomtime: Early Summer
Attracts Hummingbirds
Bee Friendly
Deer and Rabbit Resistant
Growth Rate: Medium
Border Plant, Cut Flower, Mass Planting, Specimen, Focal Point
Iris s. 'Cape Cod Boys' is a captivating Siberian iris cultivar that brings a touch of coastal charm to any garden. With its periwinkle blue flowers, darker blue veining, and clear lemon yellow signals, this clump-forming perennial is a true standout. Explore the characteristics, growing conditions, and care tips for Iris s. 'Cape Cod Boys', delving into the fascinating world of Siberian irises and their rich history.
About Irises
The Iris genus, named after the Greek goddess of the rainbow, encompasses a vast and diverse array of over 300 species. These brilliantly colored, spring-flowering perennials range from timid wildlings to the extravagant Tall Bearded Iris, each with its unique charm. Irises can be found in a variety of habitats, from standing water to formal borders, and their colors span the spectrum, offering a vibrant tapestry for any garden.
Iris plants are known for their resilience and adaptability. They thrive in most parts of the country and are largely critter resistant. Adding to their appeal, they are magnets for hummingbirds and other pollinators, bringing life and movement to the garden. Even after their blooms fade, the vertical foliage of many irises persists through the growing season, providing structure and visual interest.
About Siberian Irises
Iris sibirica, commonly known as Siberian Iris, is a rhizomatous herbaceous perennial native to Europe and Central Asia. This species has been extensively hybridized, resulting in a wide range of cultivars with varying colors, heights, and bloom times. Modern Siberian Irises are primarily derived from three species: Iris sibirica, Iris sanguinea, and Iris typhifolia.
"What we like about Iris sibirica apart from its slender grace and lovely blues and whites is its willingness to do anywhere and to continue doing for years without asking for division.” - A.T. Johnson
Siberian Irises are admired for their elegant flowers and grassy, upright foliage. They are typically very hardy and low-maintenance plants, making them a favorite among gardeners of all levels.
Characteristics of Iris s. 'Cape Cod Boys' Iris s. 'Cape Cod Boys' is a captivating Siberian iris cultivar that embodies the essence of the New England coast. Its periwinkle blue flowers are adorned with darker blue veining that intensifies towards the edges of the petals, creating a mesmerizing pattern reminiscent of the ocean's depths. The falls, or lower petals, have a ruffled edge and a silvery sheen, adding a touch of delicacy to the overall appearance. The standards, or upright petals, are a paler denim blue, providing a subtle contrast to the vibrant falls. At the base of the falls, prominent lemon yellow signals create a striking focal point, like splashes of sunshine on the water's surface.
The flowers bloom in late spring to early summer, rising above the foliage on sturdy stems. Unlike many other Siberian Irises, 'Cape Cod Boys' is a long blooming variety and can even rebloom under the right conditions, extending its season of interest.
The foliage of Iris s. 'Cape Cod Boys' is equally appealing. The upright, blue-green leaves maintain a fresh appearance throughout the growing season, providing a vibrant backdrop for the blossoms. This cultivar typically grows to a height of 27-32 inches and a width of 18-24 inches.
This exceptional cultivar was bred by Marty Schafer/Jan Sachs and introduced in 2009. It has received recognition for its outstanding qualities, including the Award of Merit in 2016, which is given to irises that have proven their value over at least five years since their introduction. It also received an Honorable Mention in 2012.
Growing and Caring for Iris s. 'Cape Cod Boys' Siberian irises are known for their hardiness and low-maintenance nature, and 'Cape Cod Boys' is no exception. They are generally deer and rabbit resistant, making them a good choice for gardens where these animals are a problem. Here are some key factors to consider when growing this cultivar:
- Sunlight Iris s. 'Cape Cod Boys' thrives in full sun or part shade. While it can tolerate shade, flowering performance may be reduced. In warmer climates, partial shade may be beneficial, especially during the hottest part of the day.
- Soil This cultivar prefers moist, fertile, humusy, organically rich, well-drained soil that is neutral to slightly acidic. While it can tolerate a range of soil types, slightly acidic soil with a pH of 5.2-6.4 is ideal.
- Water Siberian irises require consistent moisture, especially during the growing season. However, they do not tolerate waterlogging. Established plants can cope with short periods of drought.
- Planting The best time to plant Siberian irises is in the spring or late summer. When planting, ensure the rhizomes are not planted too deeply. The top half of the rhizome should be exposed to prevent rot. Space the plants 18-24 inches apart to allow for adequate air circulation, which helps to prevent the spread of diseases.
- Fertilizing Siberian irises generally do not require heavy fertilization. A light application of a balanced fertilizer in early spring can be beneficial.
- Dividing To maintain plant vigor and encourage optimal blooming, divide clumps every 3-4 years. This is best done in late summer, after flowering has finished.
- Pests and Diseases Siberian irises are generally resistant to pests and diseases. However, it is always a good idea to monitor for common iris pests such as aphids, caterpillars, and spider mites.
Other Care Considerations
- Deadheading: While deadheading is not necessary to prolong the bloom period, it can improve the appearance of the plant.
- Mulching: Applying a layer of mulch around the base of the plant can help retain moisture, suppress weeds, and regulate soil temperature.
- Winter Care: In colder climates, it is beneficial to cover the plants with a light layer of leaves or straw before the first frost to protect them from frost heaving. Remove the cover in early spring once the danger of frost has passed.
- Crop Rotation: Avoid planting irises in the same location year after year to reduce the risk of disease.
- Removing Dead Foliage: In the fall, remove dead foliage to prevent pests and diseases from overwintering.
- Handling: When handling irises, wear gloves and other protective equipment, as all parts of the plant may cause discomfort if ingested. Note that irises are toxic to dogs, cats, and horses.
Companion Plants Siberian Irises combine easy care with grace and beauty. Their flowers rise above sturdy stems and slender leaves, and feature intricate, arching standards and ruffled falls. They make stunning cut flowers that can last for up to a week in a vase. To create a visually appealing and harmonious garden, consider planting 'Cape Cod Boys' with the following companion plants:
- Geranium 'Brookside' (Cranesbill): This hardy geranium provides a long season of color with its vibrant blue flowers, complementing the hues of 'Cape Cod Boys'.
- Astrantia major 'Roma' (Great Masterwort): The intricate, pincushion-like flowers of 'Roma' add texture and interest to the planting scheme.
- Alchemilla mollis (Lady's Mantle): The soft, velvety foliage of Lady's Mantle creates a beautiful contrast with the sword-like leaves of the iris.
- Allium hollandicum 'Purple Sensation' (Ornamental Onion): The tall, purple globes of 'Purple Sensation' provide a dramatic vertical accent in the garden.
Related Species: The Yellow Flag While Iris s. 'Cape Cod Boys' belongs to the Siberian Iris group, there are other closely related species within the Iris genus. One such species is Iris pseudacorus, commonly known as the Yellow flag. This iris belongs to the Sinosiberian section and is known for its vibrant yellow flowers.
The name "Yellow flag" comes from the fluttering of the yellow fall, or lower petal. This iris has many other names, often derived from corruptions of the Anglo-Saxon word for a sword, alluding to the shape of its leaves. One unusual name is "Cheiper," which comes from the noise made by children blowing the leaves between their thumbs like a reed.
Unlike Iris sibirica, which prefers moist but well-drained soil, the Yellow flag thrives in very wet sites, even growing successfully in standing water. The green-leafed form of the Yellow flag can be quite vigorous, making it more suitable for naturalistic plantings. However, the variegated form is less aggressive and can be incorporated into more formal garden settings.
Iris pseudacorus has a rich history. It is the Fleur-de-Lis of France, chosen as an emblem by Louis VII when he joined the Crusaders. The name Fleur-de-Lis is believed to have evolved from "Fleur-de-Louis," then "Fleur-de-Luce," and finally to its current form. The Lys is a river in Flanders where Iris pseudacorus grows in abundance, further connecting the plant to its historical significance.
Iris s. 'Cape Cod Boys' is a delightful addition to any garden, offering a unique blend of beauty, hardiness, and low-maintenance care. Its captivating blue flowers with contrasting yellow signals evoke a sense of tranquility and coastal charm. This long blooming variety is a true standout among Siberian Irises, providing an extended season of interest in the garden.
Siberian Irises, in general, are a valuable asset to any landscape. They are incredibly versatile, thriving in a variety of conditions and requiring minimal care. Their elegant flowers, long-lasting foliage, and ability to attract pollinators make them a favorite among gardeners. Whether planted in beds and borders, rain gardens, or near water features, Siberian Irises bring a touch of grace and sophistication to the garden.
Consider adding Iris s. 'Cape Cod Boys' to your own garden and experience the beauty and resilience of this exceptional Siberian Iris cultivar.
Other Details
The most important part of the plant is its root system. Healthy roots are the foundation of a healthy, vibrant plant. The type of plug container used is based on the specific needs of the plants. Perennials offered as bare root traditionally perform better when planted as bare root.Planted in a specialized mix, potted plants have well established root systems. Top growth stage will vary depending on the current life cycle and time of year when shipped. In Winter and early Spring dormant plants may be shipped. Dormant plants may be planted right away, even before the last frost date.
Most bare root varieties are field grown for at least one season, though Hemerocallis and Hosta are grown for two seasons. The bulk of the soil is removed during the harvesting process and the tops of most varieties are trimmed back to the crown. They are graded, packed in shredded aspen or sphagnum moss and stored in freezers until ready to be shipped.
See our Container Sizes and Bare Root Perennials pages for more information.
Plant information and care is provided in the Overview section, Plant Genus Page and general information is provided in the Planting Care & Guides. Additional questions can be asked on each Plant page.
Plant Spacing: Using the maximum mature spread or width of a plant to guide spacing, ensures space to grow to full size. To fill an area sooner, plant them closer together. Just remember, future thinning or transplanting may be needed.
Water: Keep a close eye on newly planted perennials, especially throughout the first growing year. Most early plant loss is due to too much or too little water!
