Dwarf Pennisetum In fall, fountain grasses are a stand out. And there are so many to choose from! Fountain grass (Pennisetum sp.) is a graceful, DEER RESISTANT and sun loving ornamental grass with feathery plumes that persist into fall. Its relatively small size makes it a great plant for containers, rock gardens, borders, massing or as a specimen. Once established, they tolerate heat, humidity and full sun. Johnsen Landscapes & Pools Of course with all this wonderfulness there is a down side - certain fountain grasses are considered invasive, not all, but some. There is a lot of discussion on which varieties are invasive with people saying, 'This species is OK but that one isn't'. Some people, to be safe, don't buy any. I would counsel you to look in your area to see which ones are no nos. Nonetheless, the dwarf fountain grass is a must for a sunny fall garden. Greenwood Nursery describes why this is so: "Strol