Nepenthes robcantleyi Yellowing: Light, Temperature, and Overwatering

Yellow/brown spots on N. robcantleyi ('Queen of Hearts × King of Spades') can stem from:

• Excessive light/heat: Intense light without acclimation burns leaves.
• Acclimation: New plants often yellow old leaves while adjusting.
• Warm nights: This highlander prefers nights in low–mid 60s°F. 70°F nights cause stress.
• Overwatering: Daily watering keeps soil soggy, reducing root aeration. Water only when top soil begins to dry.

This species is very slow-growing. Changes take 3–6 months to show. Discoloration is permanent on old leaves. It grows well as a houseplant on a sunny windowsill—no terrarium needed.

Adjust: Reduce watering, cool nights if possible, ensure bright but not scorching light. Be patient.