Common NameOrnamental Onion Allium Medusa

Height20.0-24.0 Inches

Spread24.0 Inches


Hardiness Zones4,5,6,7,8

Flower ColorPurple shades

Foliage ColorGreen shades


SunlightFull Sun (> 6 hrs. Direct Sun)Part Shade (4-6 hrs. Direct Sun)

Water RequirementsLow Water NeedsAverage Water Needs

Soil QualityPoor Soil QualityAverage Soil QualityFertile Soil Quality


Soil ChemistryAcidic Soil (pH < 7.0)Neutral Soil (pH = 7.0)

BloomtimeMidsummerLate Summer

Attracts Wings: Attracts ButterfliesBee Friendly


Critter ResistantDeer ResistantRabbit Resistant

Seasonal InterestDried Seed Heads

Growth RateMedium


Garden StylePatio ContainerEclecticModernRock Garden

Other FeaturesBorder Plant, Container, Cut FlowerCut FoliageDrought TolerantEasy To GrowFragrant FlowersFragrant FoliageMass Planting

OriginNot Native to North America


This ornamental onion has snaky, twisty leaves that will remind you of the snake hair from the Medusa legend. ‘Medusa’ forms a low mound of grey-green, narrow foliage with leaves the twist slightly at the end. The nodding buds look like snakes at the tips of the stems, before they straighten to form 1.75-2” rounded clusters of light amethyst purple flowers.  Similar in flower color and flower foliage to ‘Blue Eddy’, but in a much larger form.

Butterflies and honeybees adore the flowers' sweet nectar but deer and rabbits steer clear of this perennial beauty.