Cast Iron Plant

Tolerates low light (more than 8 feet from a window, or a north-facing room. A grow light 10-12 inches away works great if your windows are not cutting it) better than almost any other foliage houseplant, including spots with no natural light when supplemented artificially. Grows best in 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) but adapts to north-facing windows and dim corners. direct sun (right in the window where sun actually hits the leaves. A strong grow light 4-6 inches away can substitute) bleaches the leaves. Variegated cultivars need slightly more light to maintain their patterns.

Tolerates average household humidity (30-50%) without complaint. Can handle dry air far better than most tropical foliage plants. misting (note: misting does not actually raise humidity meaningfully. A pebble tray or humidifier is more effective) or a pebble tray is appreciated but rarely required.

Well-draining, slightly acidic potting mix (pH 5.5-6.5). A mix of peat or coco coir, perlite, and compost works well. Does not need particularly rich soil; overfeeding causes brown leaf tips.

Brown leaf tips from overfertilizing, fluoride in tap water, or low humidity. Yellowing leaves from overwatering. Pale, bleached leaves from too much direct sun. Scale insects are the most common pest. Overall, one of the most problem-free houseplants available.