How to Plant, Grow, and Care for Pampas Grass

The striking, feathery blooms of pampas grass are prized by floral arrangers and gardeners alike. It’s even been used by float decorators for the annual Tournament of Roses parade in Pasadena, California since the early 1900s!

Named for its original home in the grassy plains of Pampas, Argentina, this tall ornamental grass was first introduced to Europe sometime between 1775-1862. It arrived in California in about 1848, going into commercial gardening shortly thereafter, and has become a common sight in coastal areas. In the 1940s, it was even planted to help prevent erosion.

But if it’s not kept in check, this tall landscape grass is known to spread like wildfire – and may become a fire hazard itself. Here, you’ll find ways to manage your pampas grass plants and ensure that your plants flourish in garden beds or containers.

What is Pampas Grass?

Pampas grass (Cortaderia selloana) is also commonly known as tussock grass, cortadera, paina, and pluma. People grow pampas grass as an ornamental privacy screen, a garden border, or as an accent.

Native Area

This feather duster shaped grass is native to the Pampas region of Argentina, South America, and also to Brazil and Chile. It is invasive in much of North America, which is why it’s best for many growing pampas grass to do so in pots and raised beds. This ornamental grass is a perennial evergreen year-round in every temperate zone. In those regions with cold winters, it loses its evergreen status.

Characteristics

The green leaves of pampas grass are razor-sharp, and can easily slice – so watch out! In spring, lovely seed heads in the form of feathery plumes emerge from the grass clump. As the wind scatters seeds, they germinate, rooting deep into the earth.

Pampas grass is dioecious, and it’s difficult to tell which plants are male or female until the plumes emerge. Female flowers are much wider and flayed at the sides. Female pampas grass catches pollen from the more compact male flowers via wind and insects. Those who want to grow new plants should purchase separate plants that include both male and female flowers.

However, gardening both sexes of plants is not recommended in the temperate zone in North America because pampas grass is classed as an invasive species, and it’s listed as one of the 16 Invasive Species Sold at Garden Centers in one of our posts. The clumps form so densely in areas where it remains evergreen that native plants have trouble gaining or retaining an ecological foothold due to lack of space. When people plant pampas grass in a zone or space that doesn’t have cold winters, they risk the spread of thick stands up to 20 miles away.

One great way to control the spread of these ornamental grasses when you’re gardening it is to cut the plumes from either male or female plants as soon as they emerge for floral arrangements. Another way to control this perennial grass is to only purchase female plants, which won’t be pollinated and won’t spread like wildfire – or provide fodder for wildfire.

Varieties

While the majority of pampas grass falls into the selloana species and subdivides into roughly 25 varietals, there are other species that also use the common name pampas grass. Here are some varieties, as well as two ‘imposter’ plant types.

‘Aureolineata’

Also known as ‘Gold Band’, C. selloana ‘Aureolineata’ is a slow-growing, compact evergreen plant which grows to a large size of about six feet. Grows golden-tan to white plumes in spring. Tolerant of both heat and cold, and well suited to container gardening.

‘Albolineata’

C. selloana ‘Albolineata’ is also called ‘Silver Stripe’. It is similar in most ways to ‘Gold Band’, but features white stripes along its leaves. Topped with white plumes of seed heads with a silver sheen.

‘Pumila’

C. selloana ‘Pumila’ is sometimes referred to as ‘Dwarf Pampas Grass’. Blooms pale yellow to ivory white plumes. Grows to about five feet. Some suppliers offer plants that don’t produce seeds to reduce the risk of invasive spread. A dwarf pampas grass well suited to container gardens.

‘Sunningdale Silver’

Another variety of white pampas. Features silvery plumes not impacted much by rainfall, as pannicles are less prone to clumping. Stems grow to ten feet.

‘Rendatleri’

C. selloana ‘Rendatleri’ or ‘Pink Feather’ is a true pink plumed pampas. Grows from seedlings to an average of eight feet. Search for ‘Rendatleri’ for stunning pink feather blooms and lovely foliage!

‘Silver Fountain’

C. selloana ‘Silver Fountain’ is a white pampas grass. Features densely-packed long, green leaves with white stripes. Produces large heads of silky, silvery plumes on seven feet tall stems in the late summer.

‘Splendid Star’

C. selloana ‘Splendid Star’ is a dwarf pampas grass with golden-streaked leaves. A hardy pampas that grows well in containers or as a border plant. Flower stalks are filled with fluffy white pannicles.

‘Monvin’

C. selloana ‘Monvin’ also known as ‘Sun Stripe’ has several yellow stripes along its leaves, and shoots up six to seven-foot tall plumes tipped with silvery-white flower pannicles in the fall. Commonly used as a windbreak plant.

‘Patagonia’

C. selloana ‘Patagonia’ produces bluish gray-green foliage in tight tussocks. Blooms rise to six feet and are full of feathery and silver-white flowers in the fall.

‘Purple Pampas Grass’

C. jubata ‘Purple Pampas Grass’ is also known as ‘Andean Pampas Grass’. Note this is not a selloana species, but a relative. Grows to 22 feet tall! Flowers start pinkish or purplish, then mature to become ivory or white. Individual plants are female. Reproduces by apomixis rather than by seed or division.

‘Hardy Pampas Grass’

Called Saccharum ravennae ‘Erianthus’, this grass is not a true pampas grass but is similar. Forms thick clumps of tall ornamental grass none to twelve feet in height. Purplish-bronze or white flowers bloom in early summer, turning to silver feather in fall. Leaves have a single white stripe down the center and turn bronze and red in the fall. Perfect landscape grass.

Planting

In many areas, planting these tall ornamental grasses may not be allowed. Hawaii and New Zealand have banned pampas grass. It’s on the invasive species list for California and Texas as well as parts of the UK and Australia. Despite these warnings, it can be grown under controlled conditions, so check with your local agricultural extension before planting!

If you’re starting from seed, use cell packs or flats rather than direct sowing. Plant your seed in a well-draining soil in mid-winter indoors. Press the seed into the surface of the soil, but do not cover. This seed requires light to germinate. Kept at 65-75°F (18-24°C), it takes 14-28 days for germination.

Transplant seedlings in the spring after the last hard frost. USDA zones that are warmer than zone 7 and that don’t get damaging cold may plant earlier.

Pampas grass can be planted either in containers or directly in the ground. Either way, plant well away from areas where pets and small children will be unsupervised, as the grass has sharp edges and can cut tender skin. Pampas grass can be extremely flammable. If you live in an area where wildfires are a concern, plant it away from homes or outbuildings.

If you have a tall variety for a border or windbreak, pick a suitable area with sandy, loamy soil. Plant six feet apart, and no deeper than it was in its container. It will spread to fill in the available space.

Dwarf varieties are suited to large containers, which prevent spreading. Large containers can be moved indoors during cold periods. Some dwarf varieties are sterile, and will not reproduce through seed, making this a non-invasive species planting option. Use a well-draining container for the best growth.

How to Grow

Pampas grass care is pretty simple! Let’s discuss how to grow pampas grass in your own garden, and how to keep this low-maintenance plant under control.

Light

Grow pampas grass in full sun to partial shade. Ideally, select an area where it will receive six or more hours of light per day. It is hardy in zones 6 through 10.

Water

For the first year after planting or transplanting, water regularly but not heavily, once to twice a week. Water slightly more in hotter climates, but know this grass handles drought. Pampas grass can tolerate salt spray, which makes it very suited to coastal growth. In most areas, the amount of irrigation that comes from natural rainfall is plenty after it is established.

Pampas grass can tolerate extreme drought as well. Not only is it drought-tolerant, but it handles a range of humidity as well.

Soil

Pampas grass can grow almost anywhere but thrives in sandy, loamy well-draining soil. Your plant will benefit from the aid of some compost before planting but does not require heavy fertilization. As long as you are working in well-drained soil, poor soil is adequate to support it. The optimal pH range to grow pampas grass is between 5.4 and 6.5. There is no need to mulch.

Temperature

It thrives in temperatures between 65 to 90°F (18-32°C). It will survive in frosts in late winter or early spring, but it requires some maintenance. To avoid most diseases related to pampas grass, bunch it together in dormancy, and transplant a portion to overwinter in a container. Then move a bunch indoors to eliminate the chance of water buildup in stalks that can occur in late winter or early spring frost.

Fertilizing

Annual (late winter) application of organic fertilizer is useful, but not always necessary when you grow pampas grass. If you do want to fertilize, apply a balanced fertilizer.

Maintenance

Any time you’re planting pampas grass or working within your common pampas grass clump, wear long pants, a long-sleeved shirt, and sturdy leather gardening gloves to protect your skin. The blades are tough to cut through, so long-handled loppers or even a chainsaw may be your best choice for tools.

When you grow pampas grass, annual pruning is needed to hack back the old parts of the plant and promote new growth. Late winter or early spring is ideal before the pampas plant starts to send up new growth and enters its active growing season. Poke a stick or other long item repeatedly into the base of the plant, as small animals may have used your plant as a nesting site over the winter.

Once you’re sure nothing’s in there, cut through the heavy leaves while keeping about six to eight inches of foliage intact. This promotes fresh growth. Occasionally, your grass will form extra clumps around the main cluster. Remove these when you do your annual pruning. Also, thin your plant every three years or so by removing about a third of the foliage and roots. This is a tough job on an established grass and may require the use of a heavy-duty saw or quality ax to get through the root cluster.

Propagation

Pampas plants are best divided when new growth appears in the early spring. However, it can also be divided in the autumn in warmer zones. To divide plants that are two to three years old, carefully dig up your plant and gently remove it. Separate segments of the root ball which have both root and grass stalks attached, and then replant them.

If your plant is four to five years or older, use a shovel to cut a smaller segment from the larger root mass, and transplant the smaller segment into a new planting location.

Harvesting

If you wish to use your pampas grass flowers for floral arrangements, harvest the pannicles as soon as the flowers have fully emerged, but before they mature and begin shedding. They can be used immediately or dried for later use. When using, spray the plumes with hairspray prior to setting them in place. This helps prevent shedding.

Common Problems

Pampas grass is pretty low maintenance. In most areas, insects, and diseases aren’t huge issues. To keep these grasses as a viable focal point in your garden, take care to look out for the following.

Growing Problems

Most gardeners have problems keeping these grasses in check in their garden. That’s why many regions are not suited for planting pampas seedlings in the ground. Sometimes gardeners inherit a property where someone thought it was a good idea to grow pampas grass, when in fact planting pampas grass in their garden was a mistake.

To adequately control it, put on your protective gear. Then wait for a rainy day, and begin pruning all the seed heads or plumes in every developmental stage. Ensure each of these does not touch the ground as the seeds within them will germinate if they touch the ground. After you prune, put seeds and all in a garbage bag. Then firmly grab the base of the foliage and pull them up by the roots. Place all the blades in your garbage bag.

Pests

When it comes to insects and small mammals in the grass, it is more likely to house them than to be bothered by them – small rodents, flea beetles, and spider mites may make your pampas grass their stronghold, but nothing tries to eat it.

Diseases

This plant may occasionally be subject to helminthosporium leaf spot, but otherwise is disease-free. The grasses may need to be removed and destroyed to stop the spread to other areas of the garden.

Frequently Asked Questions