Indoors, provide your plant with medium to bright indirect light; keep in the shade outside. High humidity is best, but a kangaroo paw fern will still perform well in lower household humidity. Water your fern when the top half of the soil has dried out. When watering, give the plant enough water so that it starts to drain out the drainage holes. In winter, watering should be reduced to half. Hardiness zones range from 9-11.