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Flowering Onion

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

Bleeding Heart


English Lavender

Plant Details

  • Common name

    Flowering Onion

  • Botanical name

    Allium giganteum

  • Variety


  • Zone

    USDA Zone 5 (-20°F) to USDA Zone 9 (20°F).

  • Light


  • Height

    42-54" (107-137 cm)

  • Habit


  • Feed

    In fall

  • Water

    Weekly during dry spells

  • Bloom Color


  • Bloom Time

    Late spring to early summer

  • Maintenance

    Keep weed free

This plant also belongs to the following collections:

  • Bob T.'s collection
  • Dennis S.'s collection