Landscaping Purple Fountain Grass – Create Bold Visual Impact
Do you want to add instant drama and texture to your garden without spending hours on maintenance? You aren’t alone; many gardeners struggle to find that one “wow-factor” plant that thrives in the heat while looking elegant from summer through fall.
I promise that landscaping purple fountain grass is the solution you’ve been looking for to elevate your curb appeal. In this guide, we will explore how to plant, style, and care for this stunning burgundy beauty so your garden becomes the envy of the neighborhood.
We will cover everything from choosing the right location to overwintering techniques for colder climates. By the time you finish reading, you will have a professional-grade plan to transform your outdoor space into a textured masterpiece.
What's On the Page
- 1 Understanding the Allure of Pennisetum Setaceum ‘Rubrum’
- 2 Choosing the Best Location for Your Ornamental Grass
- 3 Design Strategies for Landscaping Purple Fountain Grass
- 4 Step-by-Step Planting Guide for Beginners
- 5 Watering and Feeding for Maximum Growth
- 6 Pruning and Maintenance Throughout the Seasons
- 7 Overwintering Strategies for Colder Climates
- 8 Common Problems and How to Solve Them
- 9 Best Companion Plants for Purple Fountain Grass
- 10 Frequently Asked Questions About Landscaping Purple Fountain Grass
- 11 Final Thoughts on Your Garden Transformation
Understanding the Allure of Pennisetum Setaceum ‘Rubrum’
Before we dig into the dirt, let’s talk about what makes this plant so special. Known scientifically as Pennisetum setaceum ‘Rubrum’, this ornamental grass is a showstopper in any setting.
The first thing you’ll notice is the color. Unlike most grasses that stay green, this variety offers deep burgundy or purplish-red foliage that provides a striking contrast against traditional garden greens.
The “fountain” part of its name comes from its growth habit. The leaves arch gracefully outward from the center, mimicking the spray of a water fountain, which adds soft movement to your landscape.
In the mid-to-late summer, the plant produces fuzzy, bottle-brush plumes. These seed heads dance in the breeze, catching the light and adding a layer of visual interest that lasts well into the autumn months.
One of the best things about this grass is its versatility. Whether you have a sprawling backyard or a small balcony with containers, it adapts beautifully to its environment.
It is also important to note that the ‘Rubrum’ variety is generally considered sterile. This means you won’t have to worry about it aggressively reseeding and taking over your entire garden or local ecosystem.
Choosing the Best Location for Your Ornamental Grass
To get the most out of your plants, you need to put them in a spot where they can truly shine. These grasses are sun-lovers through and through, requiring plenty of light to maintain their color.
If you plant them in the shade, the deep purple hues will likely fade to a dull, muddy green. Aim for a spot that receives at least six to eight hours of direct sunlight every single day.
Soil quality is another factor to consider. While they aren’t overly picky, they absolutely hate having “wet feet,” which can lead to root rot and a slow decline in health.
Ensure your chosen area has well-draining soil. If you have heavy clay, you might want to consider planting in raised beds or amending the soil with organic matter to improve drainage.
Wind is actually a friend to this plant. Because of its flexible stems and light plumes, it handles breezy locations very well, providing that wonderful rustling sound that makes a garden feel alive.
Think about the backdrop as well. Placing these dark-foliaged plants in front of a light-colored fence or a silver-leafed shrub will make the purple tones “pop” much more effectively.
Design Strategies for Landscaping Purple Fountain Grass
When it comes to landscaping purple fountain grass, the design possibilities are nearly endless. You can use it as a focal point or as a supporting player in a larger composition.
One of my favorite ways to use it is as a “thriller” in large container displays. Place it in the center of a pot to provide height and drama, then surround it with flowering “fillers.”
If you have a long walkway or a driveway, consider planting them in a row. This creates a rhythmic, repeating pattern that guides the eye and provides a sense of structure to the entryway.
For those with larger garden beds, mass planting is a high-impact strategy. Seeing a sea of purple plumes swaying together in the wind creates a soft, ethereal effect that is hard to beat.
You can also use it to soften the hard edges of your landscape. Plant it near the corners of a patio or along a stone retaining wall to blur the lines between the built environment and nature.
Don’t forget about height layers. Since these grasses usually reach three to five feet tall, they work perfectly in the middle or back of a perennial border, depending on the surrounding plants.
They are also fantastic for “winter interest.” Even after the foliage turns tan in the late fall, the structure of the grass remains upright, providing texture during the colder, bleaker months.
Using Color Contrast Effectively
Because the foliage is so dark, it serves as the perfect foil for bright, neon colors. Try pairing it with lime-green sweet potato vines or bright yellow marigolds.
If you prefer a more sophisticated look, lean into a monochromatic palette. Pair it with dark-leafed Heuchera or “Black Magic” Colocasia for a moody, gothic garden vibe.
Silver and blue-toned plants also look incredible next to the burgundy leaves. The cool tones of Blue Fescue or Dusty Miller create a high-contrast look that feels very modern and clean.
Step-by-Step Planting Guide for Beginners
Ready to get your hands dirty? Planting is a straightforward process, but doing it right will ensure your landscaping purple fountain grass establishes quickly and grows vigorously.
- Dig the hole: Your hole should be twice as wide as the nursery pot but no deeper. You want the top of the root ball to be level with the soil surface.
- Prepare the plant: Gently squeeze the sides of the nursery pot to loosen the roots. Slide the plant out, taking care not to pull on the stems.
- Check the roots: If the roots are circling the pot tightly, gently tease them outward with your fingers to encourage them to grow into the surrounding soil.
- Placement: Set the plant in the hole and backfill with the soil you removed. Press down firmly with your hands to remove any large air pockets.
- Initial Watering: Give the plant a deep, thorough soak immediately after planting. This helps settle the soil and reduces transplant shock.
Spacing is crucial if you are planting multiple units. Give each plant about two to three feet of space. This allows for proper air circulation, which prevents fungal issues later on.
If you are planting in containers, use a high-quality potting mix that includes perlite or vermiculite. This ensures the drainage is fast enough to keep the roots happy and healthy.
Applying a thin layer of mulch around the base (but not touching the stems) will help retain moisture and keep weeds at bay while the grass is still young.
Watering and Feeding for Maximum Growth
Once established, this grass is remarkably drought-tolerant. However, during the first few weeks after planting, you’ll need to be more diligent with your watering schedule.
Check the soil daily. If the top inch feels dry to the touch, give it a drink. Once the root system is deep and strong, you can usually scale back to once or twice a week.
In extremely hot climates or during a heatwave, container-grown grasses may need water every single day. The pots dry out much faster than the ground does.
When it comes to fertilizer, less is usually more. Over-fertilizing can lead to floppy growth and weak stems that can’t support the weight of the plumes.
A single application of a balanced, slow-release fertilizer in the spring is usually all it needs. If your soil is naturally rich, you might not need to fertilize at all.
If you notice the leaves looking a bit pale or the growth stalling in mid-summer, a liquid seaweed or fish emulsion boost can provide a gentle “pick-me-up” without over-stimulating the plant.
Pruning and Maintenance Throughout the Seasons
Maintaining your landscaping purple fountain grass is mostly about timing. Since this is a warm-season grass, it does most of its growing when the weather is hot.
In warmer climates (Zones 9-11), it can stay evergreen or semi-evergreen. In these areas, you only need to prune it back in late winter or early spring before new growth starts.
Cut the entire clump down to about four to six inches above the ground. This clears out the old, dead foliage and makes room for the fresh, vibrant purple blades to emerge.
If you live in a colder zone where it is grown as an annual, you can leave it standing through the winter. The dried plumes look beautiful covered in frost or light snow.
Once the plant has completely turned brown and the spring thaw begins, you can pull the dead clump out and replace it with a fresh one from the nursery.
One pro tip: use sharp bypass pruners or even hedge shears for this job. The stems are sturdy, and a clean cut is much better for the plant’s health than a ragged one.
Always wear gloves when handling ornamental grasses. The edges of the blades can be surprisingly sharp and can cause small, irritating “paper cuts” on your hands.
Overwintering Strategies for Colder Climates
If you live in a region with freezing winters, you might be sad to see your beautiful grass die back. However, there are ways to try and save it for the next year.
The easiest method is to grow it in a container. Before the first hard frost hits, move the pot into a basement, garage, or a cool, frost-free room.
The goal isn’t to keep it growing actively, but to keep the roots from freezing solid. You only need to water it once every few weeks—just enough to keep the soil from becoming bone-dry.
In the spring, once the danger of frost has passed, move it back outside. Gradually reintroduce it to the sun to avoid sunscald on any new, tender growth.
If you want to try overwintering it in the ground in a borderline zone (like Zone 8), apply a very thick layer of mulch—up to six inches—over the crown of the plant.
This acts as a blanket, protecting the sensitive base from extreme temperature fluctuations. It’s not a guarantee, but it often works during a mild winter.
Common Problems and How to Solve Them
Even though this plant is tough, you might run into a few hiccups. The most common issue gardeners face is “flopping,” where the grass sags outward and leaves a hole in the middle.
This is usually caused by too much shade or too much nitrogen fertilizer. If your grass is flopping, try cutting it back slightly or reducing your feeding schedule next season.
Pests are rarely a major concern. Occasionally, you might see aphids or mites, but a strong blast of water from the garden hose is usually enough to dislodge them.
If you notice yellowing leaves in the center of the clump, it might be a sign of poor drainage. Check to make sure the plant isn’t sitting in a low spot where water collects.
Rust is a fungal disease that can sometimes appear as small orange spots on the leaves. To prevent this, always water at the base of the plant rather than over the foliage.
If rust does appear, prune away the affected leaves and ensure there is plenty of space between plants for air to move freely through the garden bed.
Best Companion Plants for Purple Fountain Grass
Creating a cohesive look involves choosing friends that highlight the grass’s best features. You want plants that share similar light and water requirements.
- Black-Eyed Susans (Rudbeckia): The bright gold petals and dark centers provide a classic high-contrast look that screams late summer.
- Sedum ‘Autumn Joy’: The succulent leaves and pink-to-rust flower heads complement the burgundy tones perfectly as fall approaches.
- Lantana: These heat-loving bloomers come in vibrant oranges and yellows, creating a tropical feel when paired with the arching grass.
- Silver Falls Dichondra: If you are using a container, let this silver foliage spill over the edges while the grass stands tall in the center.
- Zinnias: For a more whimsical, cottage-garden look, the bright, multi-colored flowers of zinnias look lovely poking through the purple blades.
Don’t be afraid to experiment with different textures. The fine, wispy texture of the grass looks great next to large-leafed plants like Cannas or Hostas (if in a semi-shaded spot).
Remember to consider the “life cycle” of your companions. Choose some that bloom early and some that bloom late to keep the garden looking full and vibrant all season long.
Frequently Asked Questions About Landscaping Purple Fountain Grass
Is purple fountain grass a perennial or an annual?
It depends on where you live! In USDA hardiness zones 9 through 11, it is a perennial that will come back every year. In colder zones, it is treated as a tender perennial or an annual.
How fast does it grow in a single season?
It is a very fast grower. If you start with a small nursery gallon in the spring, it can easily reach its full height of three to four feet by the middle of summer.
Can I grow this plant in full shade?
Technically it will survive, but it won’t look good. The leaves will turn green, the plant will become “leggy” and flop over, and it likely won’t produce those iconic fuzzy plumes.
Is it safe for pets?
Yes, Pennisetum setaceum ‘Rubrum’ is generally considered non-toxic to dogs and cats. However, the sharp edges of the leaves can cause mouth irritation if chewed, so keep an eye on curious pets.
When is the best time to plant it?
Wait until the soil has warmed up in the spring and there is no longer a danger of frost. These are warm-season plants and they need heat to start their growth cycle properly.
Final Thoughts on Your Garden Transformation
Embracing landscaping purple fountain grass is one of the easiest ways to bring professional-level design to your home garden. Its unique color and graceful form provide a level of sophistication that few other plants can match.
Whether you are tucking it into a container on your porch or creating a massive border along your lawn, the results are almost always spectacular. Remember to give it plenty of sun, well-draining soil, and a little bit of room to breathe.
Gardening is all about experimentation and joy. Don’t be afraid to move things around or try new color combinations until you find the look that makes you smile every time you walk outside.
Now that you have the knowledge and the plan, it’s time to get out there and start planting! Your dream garden is just a few burgundy plumes away. Happy gardening!
