Semez les graines d’iris versicolore à l’automne directement à l’extérieur, ou après une stratification froide et humide.
Sale
Sold out
Native wetland perennial
Iridaceae
Native perennials for wet areas
Blue Flag Iris (Iris versicolor) – Seeds
Iris versicolor
This Quebec native perennial produces striking blue-violet flowers above upright foliage. Adapted to wet soil, Blue Flag Iris suits shorelines, rain gardens, natural ponds, and ecological stabilization projects.
Quantity
Minimum 50 seeds
Exposure
Full sun to partial shade
Hardiness
USDA Zones 3 to 8
Difficulty level
Low to moderate
Discover the plant
Family
Iridaceae
Genus
Iris
Species
versicolor
Cultivar
Type
Native wetland perennial
Cycle
Perennial
Blue Flag Iris (Iris versicolor) is an emblematic native perennial of Quebec wetlands, recognized by blue-violet flowers delicately marked with white and yellow. Blooming from May through July, the flowers rise above upright, narrow, sword-shaped foliage that retains strong structural value after flowering ends. Plants generally reach 45 to 90 cm tall and gradually form dense clumps through spreading rhizomes. Exceptionally hardy in Zones 3 to 8, Blue Flag Iris returns reliably after severe winters and is an outstanding choice for shorelines, rain gardens, wetland borders, and naturalized landscapes inspired by the native habitats of Quebec and eastern Canada.
Blue Flag Iris prefers full sun or partial shade and loamy to clay soil that remains moist, wet, or temporarily saturated. It also tolerates shallow water at the edge of a pond, provided the rhizomes are not kept too deeply submerged for extended periods. Seeds generally benefit from light scarification followed by moist cold stratification before spring sowing, although they may also be planted outdoors in autumn. Sow them approximately 10 mm deep, maintain constant moisture, and allow time for uneven germination. A light spring application of mature compost is usually sufficient to support growth without encouraging excessive, soft foliage.
In the garden, Blue Flag Iris is ideal for shoreline buffers, rain gardens, vegetated ditches, natural ponds, and projects designed to stabilize wet soil. Its flowers attract bees, butterflies, and other pollinating insects, while the rhizomes help hold banks and reduce erosion. Pair it with Cardinal Flower, Spotted Joe-Pye Weed, Water Avens, and Canada Mannagrass to create a lush native planting adapted to wet conditions. All parts of Iris versicolor, especially the rhizomes, are toxic if ingested, so the plant should be grown strictly for ornamental and ecological purposes and kept away from pets and livestock.
Planting guide
From planting to establishment.
Planting depth
Approximately 10 mm
Spacing / density
45 à 60 cm (18 à 24 po)
Establishment temperature
18 to 22°C after stratification
Establishment time
30 to 90 days after stratification
Best planting time
Automne ou printemps
Propagation
Stratified seed or rhizome division
Growing method
Semer à l’automne à l’extérieur ou après une stratification froide et humide. Cultiver au soleil ou à la mi-ombre dans un sol riche, humide à détrempé.
Soil and care
The right conditions.
Exposure
Full sun to partial shade
Soil pH
Approximately 5.0 to 7.0
Hardiness zone
USDA Zones 3 to 8
Minimum temperature
Approximately -40°C
Watering
Regular; keep soil moist to wet
Soil type
Loamy to clay, moist to saturated
Fertilization
Light spring compost
Seasonal care
In spring, remove dry foliage before new shoots emerge and apply a thin layer of compost around the clumps. Maintain regular moisture throughout the season, especially during flowering and hot weather. Remove weeds around young plants and do not allow the soil to dry completely. After flowering, remove capsules to limit reseeding or leave a few to mature for ecological interest. Divide crowded clumps every three to five years, preferably after flowering or in early autumn, and replant the rhizomes promptly before they dry.
Container growing
A controlled environment.
Recommended pot size
30 à 40 L (8 à 10 gal)
L’iris versicolore se cultive bien en pot dans un contenant large et profond qui conserve l’humidité. Utilisez un terreau riche et constamment frais à humide, puis placez le pot au soleil ou à la mi-ombre. Évitez de laisser le substrat sécher complètement.
Bloom and dimensions
The complete profile.
Flower color
Blue-violet marked with white and yellow
Foliage color
Green
Foliage type
Deciduous
Growth rate
Moderate
Bloom period
May to July
Fruiting
Capsules containing several brown seeds
Maximum height
Approximately 90 cm
Maximum width
Approximately 60 cm per clump
Harvest
July to August
Garden associations
What to plant with it.
Good companions
Cardinal Flower, Spotted Joe-Pye Weed, Water Avens, and Canada Mannagrass
Avoid planting with
Lavender, cotton lavender, Blanket Flower, and dry-soil plants
Shoreline, rain garden, pond, and soil stabilization
From the garden to inspiration.
Frequently asked questions
Everything toknow.
Plantez l’iris versicolore au soleil ou à la mi-ombre, dans un sol humide à détrempé, notamment en bordure d’un étang ou d’un cours d’eau.
Oui. Toutes les parties de l’iris versicolore peuvent être toxiques si elles sont ingérées, particulièrement les rhizomes.
Oui. L’iris versicolore convient très bien aux berges et aux jardins d’eau. Ses rhizomes peuvent pousser dans un sol constamment humide ou légèrement submergé.
Divisez l’iris versicolore après la floraison, généralement à la fin de l’été ou au début de l’automne.
Its strengths, naturally.
Not recommended for pets
Pets
Attracts or supports pollinating insects
Pollinators
Plants that attract butterflies
Butterflies
Less attractive or generally tolerated by deer
Deer
