← Plant Guides

How to Grow Desert Flowers (Penstemon and Salvia)

Wikimedia Commons

Desert Flowers (Penstemon and Salvia)

Penstemon spp. and Salvia spp.

flower

Desert flowers, particularly Penstemon (beardtongue) and Salvia (sage), are drought-tolerant flowering plants native to arid and semi-arid regions. These vibrant perennials produce tubular or spiky flowers in bold colors ranging from red and orange to purple and blue, attracting hummingbirds and pollinators. They thrive in hot, dry conditions with minimal water and maintenance once established.

Looking for a specific variety?

Penstemon 'Husker Red' Penstemon 'Firecracker' Salvia 'May Night' Salvia greggii Penstemon digitalis Salvia guarantica 'Black and Blue'

When should you plant Desert Flowers (Penstemon and Salvia) in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Desert Flowers (Penstemon and Salvia) timeline →

Example Desert Flowers (Penstemon and Salvia) timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Desert Flowers (Penstemon and Salvia)

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Desert Flowers (Penstemon and Salvia) blooms

    Mid-to-late summer

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Desert Flowers (Penstemon and Salvia) dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8+ hours daily; essential for best flowering and disease prevention
💧
Water: Low water needs once established. Water deeply but infrequently during first growing season to establish roots. In most climates, mature plants need little to no supplemental watering. In humid regions, water only during extended dry periods. Overwatering is the primary cause of failure.
📏
Spacing: 12-24 inches depending on variety (check specific cultivar) inches
📅
Days to maturity: Penstemon and Salvia are perennials; flowering typically occurs in the first year from transplants, or second year from seed
🌱
Planting depth: Surface sow seeds or just barely cover; transplants at same depth as nursery pot

Soil

Type: Well-draining sandy or gravelly soil, tolerant of poor soil
pH: 6.0-7.5
Amendments:
Coarse sand or gravel for drainage Perlite or pumice Minimal organic matter (these plants prefer lean soil)

Growing Zones

Find your zone →

Most varieties thrive in zones 4-10, depending on species; some hardy Penstemon tolerate zone 3

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b

Sign up free to see if Desert Flowers (Penstemon and Salvia) grows in your zone — and get a personalized planting timeline.

Get my Desert Flowers (Penstemon and Salvia) timeline →

Growth Stages

1

Seedling

3-4 weeks

Tiny rosettes of narrow leaves emerge 7-14 days after sowing. Growth is slow initially.

Keep soil lightly moist but not wet. Provide bright light. Thin seedlings to prevent damping off.

2

Vegetative Establishment

2-6 months

Plant develops a robust root system and leaf mass over several months. Foliage deepens in color.

Water moderately during first season to establish deep roots. Reduce watering frequency as plant matures. Pinch tips early on to encourage bushier growth if desired.

3

Pre-flowering

2-4 weeks

Plant reaches near-mature size with dense foliage. Flower buds begin forming at stem tips.

Continue light watering. Do not over-fertilize (leads to lush foliage at expense of flowers). Ensure full sun exposure.

4

Flowering

4-12 weeks depending on variety and climate

Vibrant tubular or spiky flowers open in succession along stems. Peak color and pollinator activity occurs.

Deadhead spent flowers to encourage continued blooming. Water sparingly. Enjoy hummingbird visits. Minimal fertilizer needed.

5

Seed Set and Dormancy

Varies; dormancy 2-4 months in winter regions

Flowers fade, seed pods form (if not deadheaded). Foliage may die back in winter depending on zone.

Allow some flowers to go to seed for self-sowing or seed collection. Cut back dead stems in spring after frost danger passes. Water minimally.

Companion Planting

Plan your garden →

Plant with:

Catmint (Nepeta) Russian Sage (Perovskia) Black-eyed Susan (Rudbeckia) Desert marigold (Baileya) Blanket flower (Gaillardia) Lamb's ear (Stachys byzantina) Santolina Ornamental grasses (Stipa, Bouteloua)

Avoid planting near:

Moisture-loving plants (Hosta, Astilbe, Ferns) Plants requiring frequent watering (Hydrangea, Impatiens) Aggressive spreaders in tight space (Mint, Bee balm)

Common Pests

  • Spray with water to increase humidity; use neem oil or miticide if severe. Ensure good air circulation.

  • Improve air circulation, avoid overhead watering. Apply sulfur dust or potassium bicarbonate fungicide. Prune out affected leaves.

  • Prevent via excellent drainage and minimal watering. Remove affected plant tissue or entire plant if severely infected.

  • Spray with strong water stream, insecticidal soap, or neem oil. Encourage natural predators like ladybugs.

  • and

    Remove by hand, use copper barriers, or diatomaceous earth. Beer traps can help in damp climates.

Uses

🦋

Hummingbird magnet

Wildlife

Penstemon and Salvia flowers are irresistible to hummingbirds, who visit repeatedly throughout the blooming season. These plants provide essential nectar for migratory and resident hummingbird populations. [source]

🍳

Culinary sage varieties

Culinary

Certain Salvia species and cultivars (such as Salvia officinalis) are harvested for culinary use in cooking, teas, and seasonings. The leaves have a warm, slightly peppery flavor. [source]

💊

Traditional herbal medicine

Medicinal

Salvia species have been used in traditional medicine for throat health, digestive support, and other purposes. Some species contain compounds with potential antimicrobial and anti-inflammatory properties. [source]

🎨

Cut and dried flowers

Craft

Both Penstemon and Salvia flowers dry beautifully and hold their color well, making them excellent for dried arrangements, wreaths, and crafts. [source]

🏠

Low-maintenance landscape

Household

These drought-tolerant perennials reduce water bills and maintenance time while adding striking color to gardens, xeriscapes, and native plant landscapes. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

For seed collection, allow flowers to dry on the plant, then collect seed pods in late summer/fall before they split. For cut flowers, harvest stems in early morning when flowers are just opening. Penstemon and Salvia are primarily ornamental; however, some Salvia species have culinary uses (e.g., culinary sage).

Fun Facts

  • 🌱 Penstemon gets its common name 'beardtongue' from the hairy filament inside the flower that resembles a fuzzy tongue.
  • 🌱 Some Penstemon species are endemic to specific desert regions of the American Southwest and are specially adapted to extreme heat and aridity.
  • 🌱 Salvia is one of the largest plant genera with over 900 species worldwide, ranging from tiny alpine plants to large shrubs, and includes both ornamental and culinary varieties.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Damping Off Deadhead Full Sun Perennial
Shop Desert Flowers (Penstemon and Salvia) plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Desert Flowers (Penstemon and Salvia) planting timeline

Tell us your zip code and we'll calculate exactly when to start Desert Flowers (Penstemon and Salvia) seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Desert Flowers (Penstemon and Salvia) timeline →