returns in
304
days
Bloom calendar
BloomStruck
Bigleaf hydrangea, Mophead · Michael A. Dirr, 2015, USA
At‑a‑glance
- Group/Class: Bigleaf hydrangea, Mophead
- Height × spread: 3–4 ft (0.9–1.2 m) × 4–5 ft (1.2–1.5 m)
- Bloom window: early summer to fall; reblooming
- Color & flower form: rose pink to blue mopheads
- Fragrance: 0 none
- USDA hardiness: zones 4–9
- Breeder / Year / Origin: Michael A. Dirr, 2015, USA
- Awards/registration: S. Plant Patent PP25,566; cultivar ‘PIIHM‑II’
- Cut‑flower notes: strong stems; conditioning essential; wilt‑prone if stems dry
- Pet safety: avoid
How it differs
- Sturdier stems than many mopheads.
- Reblooms more reliably than older types.
- Patent notes improved mildew resistance.
Strengths
- Extended bloom on old and new wood
- Compact habit
- Broad color response with pH management
Care in one minute
Light: morning sun, afternoon shade.
Soil: rich, well drained; pH 5.2 to 5.8 for blue.
Water weekly; mulch 2–3 in (5–8 cm).
Deadhead; avoid severe pruning; protect crown in cold winters.
Watch‑outs
- Needs steady moisture in heat
- High pH soils cause chlorosis and pink blooms
- Hot afternoon sun can scorch leaves
Best uses (tags)
Provenance note
Selected by Plant Introductions from open pollination of ‘PIIHM‑I’; patented in 2015 and sold in the Endless Summer series.
References
- U.S. Plant Patent – ‘PIIHM‑II’ PP25,566
- NC State Extension – Hydrangea macrophylla species
- ASPCA – Hydrangea toxicity
Similar Flowers
Enjoying our flower guides? Add YourFlowersGuide as a preferred source on Google — it helps more readers find us.
Add to Preferred Sources