Allium Medusa

Quick Facts

• Botanical Name: *Allium Medusa (PP28701)

• Common Name: Ornamental Onion Medusa

• Hardiness: Zones 48 (some sources suggest Zone3 with proper sites)

• Mature Size: About 2024 in (5060cm) tall and similar spread (~24)

• Bloom Time: Midsummer into late summer (often JulyAugust)

• Flower: Rounded clusters of light amethystpurple stars, approx. 2in diameter heads.

• Unique Foliage: Greygreen, narrow leaves, sometimes twistinggiving nod to its Medusa name.

Light & Site Requirements

• Prefers full sun for best flowering and foliage display.

• Tolerates part sun/partial shade, but performance (flower size, stem length) may be reduced.

• Choose a site with welldrained soil; avoid spots that stay soggy.

Soil, Planting & Spacing

• Soil: Prefers welldrained, moderately fertile soils; sandy/loamy mixes are beneficial. Especially in heavier soils, improve drainage with grit or sand.

• Planting Depth/Spacing: Plant bulbs so crown is just at or slightly below soil surface. Space about 2024 apart to allow mature clump spread.

• In Zone3: Since hardy to Zone4, ensure site is welldrained, maybe on a slight rise or slope to avoid winter wet.

Watering & Maintenance

• Establishment: Water regularly during first season until well anchored.

• Once established: Moderately droughttolerant. Avoid overwateringbulbs dislike wet feet.

• Deadheading: Remove spent flower heads if desired, though they can also remain for winter interest (seedheads).

• Division: Clumps may be lifted/divided in either spring or fall if crowded.

Pests, Problems & Wildlife Interactions

• Pests/Diseases: Generally troublefree; watch for onion white rot or downy mildew in overly wet conditions.

• Wildlife: Excellent deer and rabbit resistance (bulbs taste unappealing to them). Attracts bees and butterflies.

• Invasiveness: Flowers are sterile (nonseeding) so minimal risk of selfsowing and spreading.

Landscape Uses

• Excellent as a midborder accent or in drifts of three or more for visual impact.

• Works well in rock gardens, sunny perennial beds, cutflower gardens (flowers make good cut stems).

• Combine with perennials that provide foliage contrastlow profile grasses, sedums, early season perennials that fade when Allium blooms.

Photo from plantaddicts.com