Nephthytis

bright indirect light (3-6 feet from a south or west window, or right next to an east window. Under a grow light, 6-10 inches away works well) is ideal, but tolerates lower light better than most aroids. Variegated cultivars need a bit more light to maintain their markings. Avoid harsh direct sun (right in the window where sun actually hits the leaves. A strong grow light 4-6 inches away can substitute), which bleaches and scorches the leaves. A north- or east-facing window works well.

Prefers 60% or higher humidity. Brown leaf tips are the first sign of low humidity or inconsistent watering. A pebble tray or humidifier helps indoors. Keep away from heating vents and air conditioning units.

Light, well-draining aroid mix. A blend of potting soil, sphagnum moss, and fine orchid bark works well, providing moisture retention alongside good aeration. Avoid dense, compacted mixes.

Root rot from overwatering. Spider mites in low humidity. The plant is classified as invasive in Florida and other warm climates if plant material is discarded outdoors. Pruning back climbing stems keeps the plant in the compact, arrowhead-leaf phase if that look is preferred.