Hydrangea Macrophylla Blue

• Originally from Japan and Korea, these deciduous shrubs have been beloved garden plants worldwide for centuries due to their spectacular floral displays.
• Large serrated leaves provide attractive foliage throughout the growing season, turning bronze or burgundy in autumn before dropping in winter.
• Flower heads can reach 20-25cm across, consisting of hundreds of small individual flowers clustered together in rounded or flattened dome shapes.
• Gardeners love their pH-responsive colour changes, allowing creative control over bloom colours through soil amendments and fertiliser choices.

• Water 2-3 times weekly during growing season, reducing to weekly in winter. Check soil moisture 5cm down before watering to avoid overwatering.
• Position in morning sun with afternoon shade, protecting from harsh western sun. In cooler climates, can tolerate more direct sunlight throughout the day.
• Plant in well-draining, humus-rich soil with pH 6.0-7.0. Add compost annually and mulch to maintain soil health and moisture retention.
• Feed monthly during spring and summer with balanced fertiliser. Use aluminium sulfate for blue flowers or lime for pink flowers to adjust soil pH.
• Prune spent flowers immediately after blooming ends, cutting back to first strong buds. Remove dead or weak stems in late winter before new growth begins.
• Maintain humidity around potted plants and ensure good air circulation. In hot weather, provide extra shade and increase watering frequency.

• Provide morning sun with afternoon shade, especially in hot Australian climates where intense afternoon heat can scorch delicate blooms and foliage.
• Water deeply but infrequently, maintaining consistent soil moisture without waterlogging. Mulch around the base to retain moisture and keep roots cool.
• Plant in well-draining, organic-rich soil with regular compost additions. Test soil pH to predict flower colours - acidic for blues, alkaline for pinks.
• Prune immediately after flowering finishes, removing old flower heads and weak stems. Avoid late pruning as this removes next season's flower buds.

• Aphids cluster on new growth and flower buds, causing distorted leaves and sticky honeydew. Spray with insecticidal soap or encourage beneficial insects like ladybirds to control infestations naturally.
• Powdery mildew appears as white dusty patches on leaves during humid conditions. Improve air circulation and avoid overhead watering to prevent fungal issues.
• Root rot develops from waterlogged soil, causing yellowing leaves and wilting. Ensure excellent drainage and reduce watering frequency, especially in clay soils.
• Scale insects create small brown bumps on stems, weakening the plant. Remove manually or apply horticultural oil during dormant season for effective control.