Hydrangeas in Full Sun in Western Kentucky: Morning vs. Afternoon Light

You're in western Kentucky (Zone 6b–7a) and want hydrangeas in an afternoon-sun spot. Can they handle it?

Short Answer: Afternoon Sun Is Risky

Morning sun + afternoon shade = ideal. Afternoon sun (especially 1–6 PM) scorches leaves, accelerates water loss, and shortens bloom life—even for supposedly sun-tolerant types.

What Happens in Full/Afternoon Sun

• Leaves scorch (brown, crispy edges).
• Flowers open earlier but fade faster.
• Plant stresses, drops buds in drought.
• Overall vigor declines over seasons.

Your Best Options for That Spot

1. Move it to morning sun / afternoon shade if possible.
2. If stuck with afternoon sun: Choose Hydrangea paniculata ('Limelight', 'Quick Fire', 'Little Lime') — most sun-tolerant. Or H. arborescens ('Annabelle', 'Incrediball').
3. Irrigate religiously: Drip line, 2–3×/week in summer.
4. Mulch 3–4 inches (pine bark, shredded leaves).
5. Provide midday shade cloth first two summers.

What to Avoid

H. macrophylla (bigleaf/mophead/lacecap) — will fry in KY afternoon sun. H. quercifolia (oakleaf) prefers shade.

Your observation is spot-on: morning sun prolongs bloom; afternoon sun shortens it. Plant for the long game—relocate or choose paniculatas.