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How to Grow Autumn Sage Black and Blue

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Autumn Sage Black and Blue

Salvia greggii 'Black and Blue'

shrub

Autumn Sage 'Black and Blue' is a deciduous to semi-evergreen ornamental shrub prized for its striking bicolor flowers featuring deep purple-black upper petals and bright blue lower petals. This cultivar blooms prolifically from spring through fall, attracting hummingbirds and butterflies with nectar-rich tubular flowers. It's a low-maintenance, drought-tolerant native Texas plant perfect for xeriscape gardens and containers.

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Example Autumn Sage Black and Blue timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Autumn Sage Black and Blue

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Autumn Sage Black and Blue

    Around Apr 18

    ≈ 1 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Autumn Sage Black and Blue dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; tolerates part shade in hot climates
💧
Water: Low to moderate water needs once established; water deeply but infrequently. Allow soil to dry between waterings. Drought-tolerant but blooms best with occasional summer watering. Reduce watering in winter.
📏
Spacing: 24 inches
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Days to maturity: Full maturity and blooming within 1-2 seasons
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Planting depth: Plant transplants at same depth as nursery pot; no special seed depth required if starting from seed indoors

Soil

Type: Well-draining sandy or loamy soil
pH: 6.0-7.5
Amendments:
Perlite or coarse sand for drainage improvement Compost for soil structure Avoid heavy clay or waterlogged soils

Growing Zones

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Thrives in zones 8-10; hardy to zone 8a with winter protection

8a 8b 9a 9b 10a 10b

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Growth Stages

1

Establishment

4-6 weeks

Young transplants with minimal branching; initial root development into garden soil or container

Water regularly (2-3 times weekly) for first 4-6 weeks to establish roots. Mulch lightly around base. Protect from extreme heat during first summer.

2

Vegetative Growth

6-8 weeks

Rapid branching and stem elongation; increasing foliage density; plant becomes bushier

Pinch back growing tips in early summer to encourage bushier growth. Reduce watering frequency as roots establish. Begin light fertilizing with balanced fertilizer.

3

Early Flowering

2-4 weeks (spring onset)

First flower spikes emerge from branch terminals; deep purple-black and blue tubular flowers appear

Maintain consistent moisture without waterlogging. Deadhead spent flowers to encourage continuous blooming. Apply light fertilizer monthly during growing season.

4

Peak Blooming

3-4 months (spring through summer)

Abundant flower production; multiple spikes with prolific bicolor flowers; peak ornamental display

Deadhead regularly to promote new flower formation. Water deeply during dry spells. Provide hummingbird feeders nearby to maximize pollinator visits. Reduce nitrogen fertilizer to avoid excess foliage.

5

Fall/Winter Dormancy

3-4 months (October-January)

Flowering continues into fall but slows with cooler temperatures; foliage may yellow or drop in cold zones; plant enters semi-dormancy

Discontinue fertilizing. Reduce watering significantly. In zone 8, apply 2-3 inches of mulch around base for winter protection. Prune dead wood in spring after last frost.

Companion Planting

Plan your garden →

Plant with:

Desert Marigold Esperanza Lantana Rosemary Lavender Wooly Sage Duranta Zinnias Blanket Flower

Avoid planting near:

Plants requiring frequent watering (hydrangeas, hostas) Shade-loving understory plants Species sensitive to drought conditions Heavy clay soil-dependent plants

Common Pests

  • Increase humidity by misting foliage; spray with water to dislodge; use neem oil or insecticidal soap if severe

  • Apply yellow sticky traps; spray with horticultural oil or insecticidal soap; encourage natural predators

  • Spray forcefully with water; apply insecticidal soap; use neem oil; encourage beneficial insects like ladybugs

  • Ensure excellent drainage; avoid overwatering; improve air circulation; remove affected plants if infection spreads

Uses

🦋

Hummingbird & Pollinator Magnet

Wildlife

The tubular bicolor flowers are highly attractive to hummingbirds, butterflies, and other pollinators. Provides abundant nectar throughout the long blooming season (spring through fall), making it an essential plant for pollinator gardens. [source]

🏠

Ornamental Landscaping

Household

Excellent for xeriscape gardens, native plant landscapes, and drought-tolerant borders. The striking bicolor flowers provide season-long visual interest and work well in cottage gardens, rock gardens, and containers. [source]

💊

Traditional Herbal Uses

Medicinal

Autumn Sage has been traditionally used in Mexican and Southwestern folk medicine for digestive support and as an infusion. Contains antioxidant and antimicrobial compounds typical of Salvia genus species. [source]

🍳

Edible Flowers & Tea

Culinary

Flowers are edible with a mild sage-like flavor and can be used as garnish for beverages and salads. Dried leaves can be brewed into a light herbal tea with subtle floral notes. [source]

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

Harvest Tips

Not typically harvested; grown as an ornamental for continuous flowering display. Deadhead spent flower spikes regularly (every 1-2 weeks during peak bloom) to maintain prolific flowering. Cut back leggy stems by one-third in spring to rejuvenate plant shape. In zone 8, prune frost-damaged wood after last spring frost.

Fun Facts

  • 🌱 The bicolor flowers are a rare color combination among salvias—the deep purple-black upper petals contrasting with bright blue lower petals create an unusually striking appearance that makes it one of the most ornamental autumn sage cultivars.
  • 🌱 Autumn Sage 'Black and Blue' is native to the Chisos Mountains of West Texas and is incredibly heat and drought tolerant, thriving in temperatures exceeding 100°F with minimal supplemental water once established.
  • 🌱 The common name 'Autumn Sage' refers to peak blooming extending into fall and early winter in mild climates, with some gardeners reporting continuous flowers from March through November in zone 9.

Gardening Terms

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

Cultivar Deadhead Full Sun Mulch Pinch Back Transplant
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