Vanda 'Roberts Delight' Struggling in Cool South Africa: Warmth Needed

Vanda Losing Leaves, No New Roots in Cool Coastal Summer

Vanda 'Roberts Delight' in Mossel Bay, South Africa: losing old leaves, 1 new leaf in 6 months, no new roots. Humidity 60%, nights 14°C (57°F), days 25°C (77°F). Was in shadehouse, now indoors.

Problem: Too Cool for This Vanda

• Most Vandas need >17°C (63°F) nights; 'Roberts Delight' not cold-tolerant.
• Cool, cloudy summer = sulking.
• High humidity helps but can't compensate for cold.

Emergency Care

• Brightest indoor window.
• Mist entire plant (roots too) daily with ½ tsp high-N fertilizer per liter water.
• Gentle air movement, humidity >50%.
• If potted, water sparingly (barely moist between).
• Bareroot: mist roots until green (hydrated).

Long-Term

• When nights stay >18°C (64°F), move to partial shade outdoors (morning/afternoon sun, 50% midday shade).
• Daily misting/soaking outdoors.
• Patience: years to bloom from this state.

Vandas are tropical—Mossel Bay is marginal. Warmth is the key it's missing.