Potted Azalea Recovery: Repotting, Water Quality, and Light Management

Your balcony azalea (Rhododendron spp.) with persistent browning despite drainage holes suffers from alkaline tap water, afternoon sun stress, and likely root-bound pot. Azaleas are ericaceous (acid-loving) plants with specific needs.

Immediate Repotting

1. Soil: 100% ericaceous compost (peat-free) + 20% perlite/grit
2. Pot: Minimum 30cm diameter; terracotta preferred (breathes)
3. Root work: Tease circling roots; trim dead (brown/mushy)
4. Planting depth: Same level — don't bury stem

Water & Light Regime

• Water: Rainwater only. Tap water raises pH, causes nutrient lockout. Collect/use rainwater.
• Frequency: Keep evenly moist — never bone dry, never soggy
• Light: Morning sun only (4 hrs max); 5 hrs afternoon sun = leaf scorch
• Location: Move to east-facing or dappled shade

Ongoing Care

• Feed: Ericaceous liquid feed at ½ strength monthly April-Sept
• Mulch: Pine needles or bark on surface
• Humidity: Mist foliage in dry weather
• Winter: Sheltered corner; wrap pot in bubble wrap if freezing

Ground Planting Alternative

If you have garden space with acidic soil (pH 4.5-5.5), plant in ground — infinitely easier maintenance. Amend planting hole with ericaceous compost.

Rainwater + morning shade + ericaceous soil = azalea success. Tap water + afternoon sun = brown leaves guaranteed.