Flowering Onion

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Enormous globes of flowers on tall, slender stems. Beautiful when planted among early-flowering perennials, bulbs and shrubs where the onion flowers seem to hover over the other plants. Excellent cut flower, lovely in bouquets. Plants disappear shortly after blooming, but return each spring for another display. 

Companion Plants

Columbine

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Columbine

Profuse flowers are a favorite of hummingbirds and make a striking addition to the cutting, flower, or rock garden. Attractive planted with ferns, hosta, pulmonaria, or at the base of larger perennials such as baptisia or delphinium. Prefers moist, well-drained soil.

Bleeding Heart

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Bleeding Heart

Striking flowers attract hummingbirds to the garden and are excellent cut. Plant in cool, moist sites to prevent summer dormancy, or combine with hosta or ferns to fill in for the dicentra during hot, dry seasons. Attractive ferny leaves.

English Lavender

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English Lavender

Wonderfully aromatic flowers and leaves, striking in the herb or flower garden. Attracts butterflies. Dried flowers and leaves are prized for potpourri, sachets or crafts. Fresh leaves and flowers are a novel addition to vinegars, sauces and cookies.

Details

Common name

Flowering Onion

Botanical name

Allium giganteum

Zone

USDA 5 - 9

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Bloom color

Purple

Bloom time

Late spring to early summer

Light

sun

Height

42-54" (107-137 cm)

Habit

upright

Water

weekly during dry spells

Feed

in fall

Maintenance

keep weed free