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A High-Desert Garden with Red and Blue Wildflowers

Bring the beauty of the high desert home with scarlet Penstemon barbatus, blue-purple Penstemon strictus, golden Zinnia grandiflora, and graceful Blue Grama Grass. These native flowering perennials and ornamental grass create a colorful, low-water garden, blooming from late spring through summer and attracting hummingbirds, bees, and butterflies.

High-Desert Garden with Red and Blue Wildflowers. Penstemon barbatus, Penstemon strictus, Zinnia grandiflora, Bouteloua gracilis

A High-Desert Garden with Red and Blue Wildflowers

Imagine following a winding sandstone path through brilliant red penstemons, vivid blue flower spikes, and golden daisies, with rugged mesas stretching across the horizon. Native grasses sway between weathered boulders, while silver-green shrubs and sculptural desert plants give the garden a wonderfully natural character. This colorful high-desert planting proves that a water-wise landscape can be anything but dull.

Four North American natives create the display: Penstemon barbatus (Scarlet Bugler), Penstemon strictus (Rocky Mountain Penstemon), Zinnia grandiflora (Rocky Mountain Zinnia), and Bouteloua gracilis (Blue Grama Grass). Their contrasting flowers, low-growing foliage, and airy grass seedheads create a pollinator-friendly garden well suited to sunny sites with good drainage.

Main plants used: Penstemon barbatus, Penstemon strictus, Zinnia grandiflora, and Bouteloua gracilis.

Key Takeaways

  • Best for: high-desert gardens, sunny xeriscapes, rocky slopes, dry borders, and Southwestern native landscapes.
  • Main season: late spring through summer, with golden zinnias and grass seedheads extending interest into fall.
  • Color palette: scarlet red, violet-blue, golden yellow, and blue-green.
  • Structure: tall scarlet penstemon spikes, dense blue flower clusters, low zinnia mats, and fine-textured grass.
  • Best effect: repeat plants in informal groups among gravel, sandstone boulders, and stepping stones.

Why This Garden Works

The contrast between red and blue gives this garden its striking personality. Penstemon barbatus produces slender spikes of scarlet tubular flowers from late spring into summer, attracting hummingbirds and adding dramatic vertical accents.

Beside it, Penstemon strictus provides rich blue-purple flowers, generally blooming in late spring to early summer. Its fuller flower spikes create a beautiful contrast with the more open, tubular blooms of Scarlet Bugler.

Closer to the path, Zinnia grandiflora forms low, spreading patches covered with small golden-yellow daisies, typically flowering from summer into early fall. Its compact habit softens the edges of stones and gravel.

Bouteloua gracilis completes the planting with delicate blue-green foliage and distinctive eyelash-like seedheads. This compact native grass brings movement and texture long after the main flowers have faded.

The winding sandstone path, scattered boulders, and open mountain views reinforce the garden’s high-desert character. Repeating the four plants on both sides of the walkway creates a natural rhythm without overcrowding the landscape.

Garden note: These plants share a preference for sunshine and well-drained soil, but they do not have identical moisture requirements. Rocky Mountain Penstemon may appreciate occasional supplemental water during prolonged drought, while Golden Zinnia and Blue Grama are particularly well adapted to dry conditions. Avoid excessive irrigation and rich, heavily fertilized soils.
 

Garden Plan, High-Desert Garden with Red and Blue Wildflowers. Penstemon barbatus, Penstemon strictus, Zinnia grandiflora, Bouteloua gracilis

Planting Recipe

🌿 Design Goal

Create a colorful, low-water high-desert garden with red and blue native wildflowers, golden flowering groundcovers, graceful grasses, and a natural sandstone path.

🎨 Suggested Planting Ratio

  • 25% Penstemon barbatus
  • 25% Penstemon strictus
  • 30% Zinnia grandiflora
  • 20% Bouteloua gracilis

Approximate visual proportions, not exact plant quantities.

📏 Spacing

  • Scarlet Bugler: 12-18 in. (30-45 cm).
  • Rocky Mountain Penstemon: 12-18 in. (30-45 cm).
  • Golden Zinnia: 12-18 in. (30-45 cm), allowing for spreading growth.
  • Blue Grama Grass: 12-18 in. (30-45 cm).

🌿 Grouping

  • Scarlet Bugler: repeat groups of 3-5 for vivid red accents.
  • Rocky Mountain Penstemon: arrange in clusters of 3-5 to create blue-purple drifts.
  • Golden Zinnia: plant in generous patches along paths and among rocks.
  • Blue Grama: weave small groups between flowers for movement and texture.

✨ How to Lay Out the Garden

Let the winding sandstone path guide visitors through the planting. Position Scarlet Bugler and Rocky Mountain Penstemon in repeated groups through the middle and rear of the beds, alternating red and blue flower spikes. Bring Golden Zinnia toward the path, where its low flowers can spill naturally between rocks. Repeat Blue Grama Grass among the perennials, leaving open gravel areas to emphasize the relaxed high-desert setting.

Through the Seasons

Late spring brings the blue-purple spikes of Rocky Mountain Penstemon and the scarlet flowers of Scarlet Bugler, with blooming sometimes overlapping into summer. Golden Zinnia takes over through the warmer months, while Blue Grama produces distinctive summer seedheads that turn straw-colored in fall. Flowering times vary with elevation, rainfall, and local conditions.

Care at a Glance

  • Light: full sun, ideally at least 6 hours daily.
  • Soil: well-drained, preferably lean, sandy, gravelly, or rocky soil.
  • Water: irrigate appropriately during establishment, then reduce watering. Occasional supplemental moisture may benefit the penstemons during extended drought.
  • Maintenance: avoid excessive fertilizer, remove unwanted seedlings, and leave some grass seedheads standing for seasonal interest.
  • Site suitability: choose locations with good drainage, suitable winter hardiness, and enough space for mature plants. High-desert conditions vary considerably with elevation.
Planning a high-desert garden? Find native plants for your conditions, then check compatibility, mature sizes, seasonal interest, and planting quantities.

Garden Information

Hardiness 4 - 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 10, 11
Exposure Full Sun
Season of Interest Spring (Late), Summer (Early, Mid, Late)
Maintenance Low
Water Needs Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral, Alkaline
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Southwest, Arizona, New Mexico, Colorado, Rocky Mountains
Tolerances Drought, Dry Soil
Attracts Bees, Butterflies, Hummingbirds, Birds
Landscaping Ideas Beds And Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage, Pollinator Garden, Prairie and Meadow

Plants In This Garden

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Penstemon (Beardtongue) Zinnia
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Alternative Plants to Consider

Penstemon eatonii (Firecracker Penstemon)
Penstemon pinifolius (Pine-needle Beardtongue)
Penstemon mensarum (Grand Mesa Beardtongue)
Tetraneuris acaulis (Angelita Daisy)
Tetraneuris scaposa (Four-Nerve Daisy)
Koeleria macrantha (Prairie Junegrass)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.

Garden Information

Hardiness 4 - 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 10, 11
Exposure Full Sun
Season of Interest Spring (Late), Summer (Early, Mid, Late)
Maintenance Low
Water Needs Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral, Alkaline
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Southwest, Arizona, New Mexico, Colorado, Rocky Mountains
Tolerances Drought, Dry Soil
Attracts Bees, Butterflies, Hummingbirds, Birds
Landscaping Ideas Beds And Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage, Pollinator Garden, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Penstemon (Beardtongue) Zinnia
Get Garden Design Ideas
Search Gardens

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