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Endless Summer
Bigleaf hydrangea, Mophead · Vernon G. Black, 2004, USA
At‑a‑glance
- Group/Class: Bigleaf hydrangea, Mophead
- Height × spread: 3–5 ft (0.9–1.5 m) × 3–5 ft (0.9–1.5 m)
- Bloom window: early summer to fall; reblooming
- Color & flower form: pink to blue mophead clusters
- Fragrance: 0 none
- USDA hardiness: zones 4–9
- Breeder / Year / Origin: Vernon G. Black, 2004, USA
- Awards/registration: S. Plant Patent PP15,298; cultivar ‘Bailmer’
- Cut‑flower notes: medium stems; conditioning essential; wilt‑prone if stems dry
- Pet safety: avoid
How it differs
- Reblooms on old and new wood.
- More cold tolerant than many bigleaf types.
- Patent notes better mildew tolerance than ‘Nikko Blue’.
Strengths
- Long season with deadheading
- Large, showy heads
- Performs in containers and borders
Care in one minute
Site: morning sun, afternoon shade; shelter from wind.
Soil: rich, well drained; pH 5.2 to 5.8 for blue tones.
Water weekly; maintain 2–3 in (5–8 cm) mulch.
Feed lightly in spring; avoid hard pruning; deadhead after bloom.
Watch‑outs
- Needs steady moisture; mulch helps
- Leaves scorch in hot afternoon sun
- Blue color needs acidic soil with aluminum
Best uses (tags)
Provenance note
Cultivar ‘Bailmer’ discovered in Minnesota and patented in 2004. Marketed as Endless Summer The Original.
References
- U.S. Plant Patent: ‘Bailmer’ PP15,298
- Missouri Botanical Garden: Hydrangea macrophylla ‘Bailmer’
- ASPCA: Hydrangea toxicity
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