Iris pseudacorus [large flower form]

Also Known As

Iris pseudacorus tetraploid
Iris pseudoacorus
Yellow Flag
Yellow Flag
Yellow Flag Iris

Plant type

perennial, bulb / corm / tuber, aquatic

size

H: 4'-6'
W: 3'

planting zones

4a-9b

More Options

Iris pseudacorus [large flower form] plant details

Iris pseudacorus [large flower form] is a broadleaf deciduous perennial aquatic bulb / corm / tuber with green foliage. In spring and summer yellow flowers emerge. Features grassy texture. Attracts bees making it an excellent addition to pollinator gardens. Grows well with sun - mostly shade and even moisture - regular water. Does well in acidic and well-drained soil. A good option if you're seeking something verticillium wilt resistant.

CHARACTERISTICS OF Iris pseudacorus [large flower form]

Plant type: perennial aquatic bulb / corm / tuber
Plant family: iridaceae
Foliage: deciduous green
Mature size: 3 FT wide, 4 FT - 6 FT - tall
Flowers: yellow blooms in spring and summer
Uses: border plant, cutting garden, edging plant, fragrant, rock garden

GROWING CONDITIONS for Iris pseudacorus [large flower form]

USDA Zones: 4a - 9b
Sun exposure: sun - mostly shade
Watering frequency: even moisture - regular
Resistant to: deer and rabbit, verticillium wilt
Soil needs: acidic and well-drained

Nursery contributed plant descriptions

Very tall iris (up to 6') with clear yellow flowers. Ideal for a wet spot. Height can add background interest to lower growing perennials. Averages about 4' tall and can spread up to 36". Awards: Award of Garden Merit from the Royal Horticultural Society. Recommended by: the United States National Arboretum.

By: Fantastic Plants

An especially robust clone, taller and with larger flowers than the species. Shiny dark green leaves. Prefers full sun but will tolerate semi shade and thrives at the edge of the pond, in a bog or in the garden, though if grown dry, will be slightly smaller.