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Achillea ptarmica
Species; herbaceous perennial
At‑a‑glance
- Group/Class: Species; herbaceous perennial
- Height × spread: 18 to 24 in (45 to 60 cm) × 18 to 24 in (45 to 60 cm)
- Bloom window: June to September
- Color & flower form: White daisies; some forms have double, pompon‑like heads
- Fragrance: 1 trace
- USDA hardiness: zones 3 to 9
- Breeder / Year / Origin: unknown, unknown, Europe and western Asia
- Cut‑flower notes: Used fresh or dried; NC State trials of ‘Pearl Reselected’ reported a short vase life around 3 days; harvest fully open for best results.
- Pet safety: unknown
How it differs
- Prefers slightly more moisture than typical meadow yarrow
- White blooms and many double forms rather than flat plates
- Lower stature suits mid‑border and small gardens
- Tends to spread slowly by rhizomes
Strengths
- Long summer bloom in sun
- Good for fresh and dried arrangements
- Tolerates light shade
- Deer resistant
Care in one minute
Site: full sun to light shade.
Soil: average, well‑drained; tolerates slightly moister sites than many yarrows.
Water: regular moisture the first season, then moderate.
Feeding: light; excessive fertility encourages lax growth.
Grooming: deadhead to prolong bloom; divide clumps every 2 to 3 years.
Winter: hardy in the stated zones without special protection.
Watch‑outs
- Can sprawl or appear weedy if not divided
- Avoid heavy, wet soils
- May need division every few years to maintain vigor
Best uses (tags)
Provenance note
Native to Europe and western Asia; double selections grouped as The Pearl Group are widely grown for cut flowers.
References
- Missouri Botanical Garden – Plant Finder: Achillea ptarmica (The Pearl Group)
- RHS – Achillea ptarmica profile
- USDA PLANTS – Achillea ptarmica
- NC State Cut Flowers Trial – Achillea ptarmica ‘Pearl Reselected’
