Leucanthemum × superbum 'Alaska'
A classic Shasta daisy cultivar known for mid to late summer bloom. Plants are medium tall with strong stems and single white daisies. It grows reliably in full sun and average garden soils that drain well. Like other Shasta daisies, it is short lived in heavy or consistently wet soils.
At‑a‑glance
Group/Class: Shasta daisy
Height × spread: 18 to 36 in (45 to 90 cm) × 18 to 24 in (45 to 60 cm)
Bloom window: July to August
Color & flower form: white rays with yellow disk; single
Fragrance: 1 trace
USDA hardiness: zones 5 to 9
Breeder / Year / Origin: unknown
Cut‑flower notes: rigid stems; useful for garden bouquets
Pet safety: unknown
How it differs
- mid to late season bloom compared to many seed strains
- classic single form on sturdy stems
- older selection widely available
Strengths
- dependable white daisies in summer
- tolerates some light shade in hot climates
- good cut flower potential
Care in one minute
- Grow in full sun; provide light afternoon shade in hot summer regions.
- Use average to moderately fertile soil with good drainage.
- Water to establish; then irrigate during prolonged dry periods.
- Deadhead to encourage additional bloom; shear after peak if foliage declines.
- Divide clumps every 2 to 3 years to maintain vigor.
Watch‑outs
- wet winter soils can be fatal
- may be short lived without division in free draining soil
Best uses (tags)
borders, cutting, pollinators
Provenance note
Long established cultivar formerly listed under Chrysanthemum maximum. Still common in perennial borders for its classic appearance.
References
Missouri Botanical Garden Plant Finder – Leucanthemum × superbum ‘Alaska’
Chicago Botanic Garden Plant Evaluation Notes – Leucanthemum × superbum and related daisies
Written by: Your Flowers Guide editorial team
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