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Nepenthes lowii White Blotches: Aging Leaves or Heat Stress?

Grower has N. lowii (~10", small 5" leaves, 6" pitchers). White blotches on one leaf. Greenhouse, full sun with bubble wrap shade. Live moss + perlite, moist. 10°C night, 30°C day. Growing with other highlanders.

Likely Normal Aging on Older Leaf

No photo, so assuming tan blotches on older leaf. N. lowii is slowest-growing Nepenthes—leaves last long. Near end of life, they discolor conspicuously (few new leaves to hide them).

30°C is high for lowii (ideal 20–25°C). 26°C+ = hot day, accelerates leaf aging. Night temp perfect. Discoloration on one leaf, not widespread = healthy plant.

If assumptions wrong, send photo + specifics.

Good growing!
Jacob Farin

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