Brown Spots on Nepenthes 'Miranda' Leaves: Sunburn or Leaf Miners?

Two Likely Causes for Mid‑Leaf Necrosis

A 5‑year‑old N. 'Miranda' developing brown patches on middle‑aged leaves in spring (before moving outdoors) suggests:

1. Early sunburn: Plant is less UV‑adapted after winter indoors. Move out gradually; trim badly damaged leaves.
2. Leaf miners: Tiny larvae inside the leaf. Check with a hand lens; if seen, remove affected leaves and treat with systemic insecticide.

If new growth is clean and pitchers form, the plant will outgrow the damage.