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How to Grow Hydrangeas: Complete Care Guide | Arden

Grow massive hydrangea blooms. Complete guide on pruning, soil pH, color changing, and care. Design your garden with Arden.

Hydrangeas deliver oversized, soft flower heads in blues, pinks, purples, and whites. The famous color-shift trick — acidic soil for blue, alkaline for pink — still fascinates gardeners. Plant once, enjoy for decades.

Sun: Part sun. Water: High. Zones: 5–9. Height: 3–6 ft. Bloom time: Summer.

Plant in morning sun with afternoon shade. Keep consistently moist — hydrangeas wilt dramatically in dry soil. For blue flowers, amend soil with aluminum sulfate. For pink, add garden lime. Prune depending on species — know whether yours blooms on old or new wood.

FAQ

Preguntas Frecuentes

01 Why are my hydrangeas not blooming?

Usually one of: pruning at the wrong time, too much shade, late frost on buds, or excess nitrogen fertilizer. Check your cultivar's bloom-wood type and adjust.

02 How do I change hydrangea color?

Only bigleaf hydrangeas change color. Acidic soil (pH <6) gives blue; alkaline (pH >7) gives pink. Takes a full season to shift.

03 Why are my hydrangea leaves wilting even though I watered?

Hydrangeas wilt dramatically in afternoon heat even with moist soil — it's often cosmetic and they recover overnight. But persistent wilt after evening means real drought stress. Water deeply and mulch to retain moisture.

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