Also known as the “Sword Fern,” this plant not only looks sharp, but it also makes a great natural home air purifier! Native to Australia, the “Kimberly Queen” is more tolerant of heat and drought than other ferns. In cold climates, it may be grown outdoors as an annual, or as a perennial when overwintered indoors. This fern has an upright habit, which makes it a good choice for vertical containers.