Nepenthes talangensis Leaf Spots and Pitcher Failure: Temperature Mismatch

N. talangensis is a true highlander requiring cool nights. Your conditions (80s°F days, 60s°F nights) are too warm for optimal growth.

Ideal Conditions

• Days: low 70s°F (21–23°C)
• Nights: upper 50s to low 60s°F (14–17°C)
• In our greenhouse, this species only pitchers in cool fall/spring, not summer.

Leaf Spots Are Normal

Older leaves developing brown/black spots is species-dependent and not necessarily a problem if new growth is healthy. Remove unsightly leaves when desired.

Action

• Reduce daytime temperatures if possible.
• Ensure night cooling (air conditioning, evaporative cooling, or basement placement).
• Stop misting if it raises humidity without cooling.

Resource

Upcoming DVD Volume 3 covers Nepenthes troubleshooting.

Good Growing!

Jacob Farin