Plant These 6 Ornamental Grasses in August – For Effortless Movement, Texture and Lush Fall Drama

Fall-blooming perennials and cool-season crops may top your garden list for August. But don’t ignore another easygoing plant that is sure to add focus and fluidity to your autumn garden: container-grown ornamental grasses. These grass varieties come in all sizes and many shades, bringing texture, graceful movement, and welcome height to fall displays.

When late summer heat has often burned out tired annuals, these low maintenance ornamental grasses are the ultimate architectural rescue squad, and they set you up beautifully for the season ahead. By filling mid-summer border gaps now, you aren’t just adding static green filler. You are introducing dynamic movement, rustling soundscapes, and winter-long silhouettes that stay stunning straight through frost.

And here’s the best news. When you plant ornamental grasses, you bring lovely additions to your yard that require surprisingly little maintenance. Most are resilient, low-maintenance ornamental grasses that won’t demand constant attention: no mowing, limited irrigation, and only occasional pruning. For time-strapped gardeners, they are the definition of low-effort landscaping that gives you exceptional reward.

Great Grasses to Plant in August

Planting container-grown ornamental grass in August is a win-win endeavor. The grass is happy to find its roots in warm soil, while you’ll get ornamental grass that offers many years of color in the landscape. While air temperatures begin their subtle late-summer dip, the soil remains warm for weeks. This encourages container-grown grasses to establish massive root networks in half the time it takes during spring.

Of course, August can look different in different planting zones. If you live in an area that experiences heatwaves or severe heat in late summer, you may do better postponing the transplanting until the weather breaks. However, if the heat isn’t extreme, the transplants will survive as long as they get sufficient water. Check your soil’s water levels prior to planting with the excellent Raintrip 4-in-1 Soil Meter from Amazon, which also checks for light and soil pH levels as well as nutrient load.

Planting these grasses in heavy clay is a recipe for crown rot. Add some well-rotted compost to break up compaction and ensure good drainage. To give late-summer transplants a head start without burning tender new roots, top-dress your soil with a sprinkle of Espoma Organic Bio-Tone Starter Plus from Home Depot. Packed with beneficial mycorrhizae, it accelerates root development in warm soil.

Don’t forget to water the transplants well and often during the hottest parts of August. If your area experiences extreme heat after you plant, provide them with temporary afternoon shade to prevent severe transplant shock. If you are planting in containers, opt for heavy terracotta pots with large drainage holes. Avoid heavy nitrogen fertilizers and focus on root hydration and soil conditioning.

1. Fountain Grass

Fountain grass (Pennisetum alopecuroides) is a joy to behold. Hardy in zones 5-9, it offers soft plumes that resemble bottlebrush and arch gracefully over mounds of burgundy leaves. Fountain grass really hits its stride from late August through November, when its bristly inflorescences catch the low golden hour light. For a lush smoky purple grass that also flourishes in containers, try Red Head Fountain Grass Live Plants from Plant Addicts.

This grass needs a full sun location (at least 6 hours of direct sun daily) and well-drained soil, making it a low-maintenance choice for drought-tolerant spaces. It just requires some deep watering for the first few months after planting, then only occasional watering once established. Plant it alongside coarse-textured late bloomers such as black-eyed Susans (rudbeckia) or Autumn Joy sedum to accentuate its soft, plushy depths.

2. Maiden Grass Morning Light

Are you looking for a silver splash of texture? Maiden grass (Miscanthus sinensis ‘Morning Light’) is beloved for its fine green leaves with thin white edges that effortlessly catch the light. The plant takes on a soft, shimmering silver look that slots easily into any space, but especially those devoted to classic styles as well as prairie plantings. For affordable texture that adds variegated tones, try Perennial Farm Marketplace’s Variegated Maiden Grass Morning Light from Amazon.

Maiden grass grows tall and can reach 9 feet (3m) tall in zones 4-9. Its feathery flower heads dance in the breeze from late summer well into winter. These transform from reddish-bronze in summer to fluffy moonlight white by fall. This grass just needs full sun and well-draining soil. Add a little Rosy Soil Biochar Booster from Walmart to improve nutrient holding capacity and water retention. Plant this dancing grass where it can be backlit by the sun to highlight its silvery edges.

3. Blue Fescue Elijah Blue

Blue plant lovers will adore this hard-working ornamental. ‘Elijah Blue’ is the quintessential cool-season grass for sunny borders in zones 4-8. If you plant blue fescue (Festuca glauca) in August, just make sure you have healthy nursery stock with strong root balls, and provide some afternoon shade. Even temporary shade in hot days can make a big difference to this powder blue beauty. FlowersBulbs Blue Fescue Plants from Walmart is great for budget-lovers.

As well as working well in mass plantings, rockeries, and borders, this compact ornamental grass is a fine choice for smaller yard spaces. Its bright blue, spiky mounds only grow to 10 inches tall (25cm) and work well for edging and pathway planting. When transplanting container-grown plants, just make sure your soil has good drainage and don’t be afraid to add some coarse sand or grit. This plant’s blue hues look gorgeous alongside purple penstemons or deep red heuchera.

4. Pink Muhly Grass

Wispy pink muhly grass (Muhlenbergia capillaris) is a stunning ornamental. It makes me think of clouds so powerfully that Joni Mitchell’s song Both Sides Now comes to mind when I look at it. Native to the eastern and central US (zones 6-9), it is arguably the most breathtaking autumn grass available and it reaches 3 feet (1m) tall. Starting in late August, it produces a shimmering, ethereal mist of plumes that last through November. You can currently buy Pink Muhly Grass Live Plants from Fast Growing Trees for a generous 30% discount with the checkout code.

With its striking cotton-candy hue and purple autumn flower plumes, this grass works well in groups or along pathways. Place it in your hottest, sunniest spot. It is fiercely drought-tolerant and heat-hardy once rooted. Just keep a close eye on soil moisture. You’ll want to irrigate deep and slow twice a week until the weather cools. Pair this grass with goldenrod (Solidago) or native purple coneflowers for a showstopping native display that will keep vibrating deep into fall.

5. Japanese Forest Grass Aureola

If you’re looking for shade plants that can dazzle in the gloom, this shade-tolerant ornamental grass is perfect for August and fall planting. Japanese forest grass (Hakonechloa macra ‘Aureola’) offers a compact shape and will liven up your landscape with its bright gold and green striped leaves and cascading waterfall habit. You can buy Aureola Golden Variegated Japanese Forest Grass from Plant Addicts for generous cascading color and structure in zones 5-9.

Choose a cool, shaded area under trees or next to a shady wall and make sure it is protected from the hot afternoon sun. Water it deeply at least once a week and put a thick mulch around the base, using coarse wood chippings or some shredded bark. Growing 18-20 inches (45-50cm) tall, its arching blades create a graceful, bamboo-like elegance that takes on reddish-pink blushes in cooler fall weather. Partner with large, lush hosta, ferns, and deep purple coral bells.

6. Mexican Feather Grass

With delicate leaves and fluffy flower heads, Mexican feather grasses (Nassella tenuissima) dance in the slightest breeze. Wherever you plant this graceful dancing silk, it brings a soft, natural look. Reaching 2 feet (.6m), these self-seeders are considered invasive in some areas, so check before you buy. Hardy in zones 7-10, Mexican feather grasses are easy to grow, love the sun, and tolerate partial shade. Buy Greenwood Nursery Mexican Feathergrass from Amazon if you’re a budget.

Its silvery-green flower heads ripen into soft golden blonde strands by fall. It thrives in lean, poor, sandy or rocky soils, where other plants might struggle. Add a little Soil Sunrise Perlite Mix from Walmart to toughen up damper soils. Pair this grass with drought-tolerant succulents, lavender, or salvia in Mediterranean-style layouts. For restricted regions, consider native blue grama grass as a safe alternative.

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