Gloxinia

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 essential - think a few feet back from an east- or north-facing window. direct sun (right in the window where sun actually hits the leaves. A strong grow light 4-6 inches away can substitute) scorches the velvety leaves. In 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), flowering is sparse. No direct afternoon sun under any circumstances.

Needs at least 50% relative humidity. Use a pebble tray or room humidifier rather than misting (note: misting does not actually raise humidity meaningfully. A pebble tray or humidifier is more effective), since wet foliage causes crown rot and gray mold.

Well-draining, slightly acidic mix (below pH 6.0). African violet potting mix works well. Good aeration is important - dense or waterlogged soil promotes crown rot.

Crown rot and gray mold from overhead watering or excessive humidity are the main issues. Also susceptible to mealybugs, fungus gnats, aphids, and spider mites. Leaf spots are usually caused by cold water hitting warm leaves.