Allium 'Serendipity ®'
Allium ‘Serendipity’
Description
Allium ‘Serendipity’ is a mutation of the popular cultivar ‘Millennium’ and owes its name to the unexpected nature of this selection. The plant retains all the strong qualities of its parent — including reliability, long flowering and a sturdy habit — while clearly distinguishing itself through its attractive blue-green foliage.
The word serendipity refers to a fortunate and unexpected discovery, making it a very fitting name for this mutant of the well-known ‘Millennium’.
The spherical flower umbels are rose-purple in colour and appear abundantly from mid to late summer. In full bloom, ‘Serendipity’ forms a strong and uniform display, suitable for both private gardens and professional planting schemes. When crushed, the foliage releases a mild onion scent, typical of the genus Allium.
Personal evaluation
To be assessed — first availability expected in autumn 2026.
Plant type
Perennial
Flower colour
Rose-purple
Flower form
Spherical umbels
Flowering period
July – August
Height
35–45 cm
Spread
Approx. 30–35 cm
Foliage
Blue-green, narrow, aromatic
Position
Full sun
Soil
Well-drained soil; dry to moderately moist
Hardiness
Very hardy (approx. −25 °C)
Maintenance
Low
Key features
• Mutation of ‘Millennium’ with decorative blue foliage
• Highly attractive to bees and butterflies
• Strong, compact growth
• Reliable and uniform in planting schemes
Uses
Border plant, mass planting, prairie-style planting, combinations with ornamental grasses and other perennials
Pruning
Remove spent flower heads for a tidy appearance
Origin
The species Allium senescens is native to Central and East Asia, including Mongolia, Siberia, northern China and Kazakhstan, where it grows on dry, rocky slopes and open grasslands.
Introduced by Walters Gardens.