Zones 4-9. We haven't yet found true mini ferns, so we replicate them a tiny perennial leptinella. Squalidia is smaller leafed (about 1 inch x 1⁄4 inch) than Verdigrass. Same culture, even smaller flowers (great dried for doll house bouquets. Please note that in full sun and with age, all mini ferns will reduce the leaf size.