Mexican Butterworts (Pinguicula gigantea) Struggling in Arizona Heat

Pinguicula gigantea and other Mexican butterworts prefer stable, mild conditions (like their native mountain habitats). In Arizona, a west-facing window likely causes extreme temperature/humidity swings, stunting growth.

Best solution: Grow under artificial lights (26W CFL, 6500K, 6–8" above plant, 14–16 hrs/day) away from windows. This provides stable, cool conditions year-round.

Your N. spatulata and N. truncata tolerate the window better—they're tougher. But Mexican pings often need more control.

Alternative: If you must use a window, choose east-facing with sheer curtain for gentler morning light.