Life Cycle
Perennial
Plant Characteristics
Bold blooms
Growth Habit
Upright clumping
Bloom Season
Summer
Flavour Profile
Mild onion
Suitable for
Outdoor
Seed Type
Open Pollinated
Plant Type
Flowering Plant
Planting Season
Spring
Fruit Size
Not applicable
Plant Height
60–90 cm
Light Requirement
Full Sun
Water Needs
Low moderate
Hardiness Zones
4–9
Container Garden
Yes
Plant Spacing
30–40 cm
Planting Depth
Surface sow
Growing Conditions
Well drained soil
Frequently Asked Questions
What makes Allium macranthum different from common ornamental onions?
What makes Allium macranthum different from common ornamental onions?
It is valued for its large rounded flower clusters and elegant perennial growth.
Can this allium create vertical interest in borders?
Can this allium create vertical interest in borders?
Yes, the tall flowering stems add height and structure to garden displays.
Will the blooms combine well with ornamental grasses?
Will the blooms combine well with ornamental grasses?
Yes, they pair beautifully with grasses and sun-loving perennials.
Can Allium macranthum be planted in sunny beds?
Can Allium macranthum be planted in sunny beds?
Yes, it performs best in locations with plenty of direct sunlight.
Do bees and butterflies visit the flowers?
Do bees and butterflies visit the flowers?
Yes, the blooms may attract bees, butterflies, and other beneficial pollinators.
Does this perennial need dividing every year?
Does this perennial need dividing every year?
No, established clumps usually grow well for several seasons before division is needed.