Pony Tails Mexican Feather Grass (Nassella) Live Plant, Tan Flowers and Green Foliage, 4.5&nbsp;in. Quart Pony TailsGrass from Proven Selections has tan flowers and green foliage.This award-winneris heat tolerant but isnot recommended for California gardens, where it has been identified as invasive. Prefers partial to full sun (4+ hours) and average soils. Grows to be1-2 feettall and1.5-2 feetwide. Quart grasses are 5-10 inches tall when they are shipped, depending on the season. Hardiness Zones: 7-10. Be sure to check your USDA Hardiness Zone if you want this plant to come back year after year. Hand-picked by experienced shippers and delivered fresh from the greenhouse in a 4.5 in.quartcontainer. Proven Winners guarantees all of its plants are correctly packaged in specially designed boxes, arrive in good condition and are accurately labeled. This grass will look beautiful in containers and landscapes. To introduce the most unique, highest quality plants, Proven Winners are tested for years in gardens across the world. Our plants are unsurpassed in terms of flowering, growth and garden performance.