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How to Grow Claret Cup, Scarlet Sage, Purple Vervain

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Claret Cup, Scarlet Sage, Purple Vervain

Glandularia pulchella

flower

Glandularia pulchella is a vibrant, low-growing perennial native to the southwestern United States and northern Mexico, characterized by brilliant scarlet to crimson tubular flowers that bloom prolifically. This drought-tolerant plant forms spreading mounds and is beloved by hummingbirds and pollinators. It thrives in hot, dry conditions and is excellent for rock gardens, borders, and xeriscaping.

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Example Claret Cup, Scarlet Sage, Purple Vervain timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Claret Cup, Scarlet Sage, Purple Vervain

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Claret Cup, Scarlet Sage, Purple Vervain blooms

    Around Jun 16

    ≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Claret Cup, Scarlet Sage, Purple Vervain dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 8+ hours daily; essential for best flowering
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Water: Low water needs once established; drought tolerant. Water moderately during establishment and bloom. Reduce watering in winter. Overwatering leads to root rot and reduced flowering.
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Spacing: 12-18 inches
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Days to maturity: 60-90 days to first flowers from transplant
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Planting depth: Surface sow or press seeds lightly into soil; needs light to germinate

Soil

Type: Well-draining sandy or gravelly soil
pH: 6.5-7.5
Amendments:
Perlite for drainage Coarse sand Gravel or decomposed granite

Growing Zones

Find your zone →

Thrives in zones 8b-10, performs well in hot, arid climates

8b 9a 9b 10a 10b

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Growth Stages

1

Seedling

2-3 weeks

Tiny seedlings with cotyledons emerge; require consistent moisture but not waterlogged conditions

Provide bright light immediately. Keep soil barely moist. Thin seedlings to proper spacing. Avoid damping off by ensuring good air circulation.

2

Vegetative Growth

3-4 weeks

Low-growing rosette forms with small oval leaves. Plant spreads gradually, building dense foliage structure

Water moderately during dry spells. Apply light mulch around plants. Begin hardening off transplants 1-2 weeks before planting out.

3

Flowering

8-12 weeks (may be longer in ideal conditions)

Abundant tubular flowers in brilliant scarlet-crimson colors appear at branch tips, arranged in tight spikes

Deadhead spent flower spikes to encourage continuous blooming. Ensure full sun exposure. Reduce nitrogen fertilizer to promote flowering over foliage.

4

Peak Bloom & Pollination

6-12 weeks or more

Plant is covered with vibrant flowers attracting hummingbirds, butterflies, and native bees. Flowers continuously develop along extending stems

Minimal intervention needed. Avoid heavy-handed pruning. If grown in containers, ensure adequate drainage. Monitor for pests.

5

Seed Development & Decline

4-8 weeks

Flowers fade and small seed capsules develop. Plant may slow in late summer heat or begin winding down

Allow some flowers to remain for seed set if desired. Prune back lightly if plant becomes leggy. Reduce water further as temperatures cool.

Companion Planting

Plan your garden →

Plant with:

Desert marigold Blanket flower (Gaillardia) Desert zinnia Black-eyed Susan Rosemary Lantana Esperanza (Tecoma stans) Desert sage

Avoid planting near:

Heavily mulched plants Plants requiring frequent watering (hydrangeas, ferns, hostas) Shade-loving perennials

Common Pests

  • Spray with water to dislodge; use neem oil or miticide if severe. Ensure adequate air circulation.

  • Use yellow sticky traps. Spray with insecticidal soap or neem oil. Remove heavily infested leaves.

  • Improve drainage immediately. Allow soil to dry between waterings. Remove affected plant material. Apply fungicide if caught early.

  • Improve air circulation. Spray with sulfur dust or fungicide. Remove heavily affected leaves. Avoid overhead watering.

Uses

🦋

Hummingbird Magnet

Wildlife

Glandularia pulchella's vibrant scarlet tubular flowers are irresistible to hummingbirds, making it an excellent plant for hummingbird gardens and pollinator conservation. The abundant nectar and extended bloom period provide consistent food sources. [source]

🏠

Xeriscaping & Water Conservation

Household

This drought-tolerant native plant is ideal for water-wise landscaping in arid and semi-arid regions. Once established, it requires minimal supplemental watering, making it perfect for sustainable garden design. [source]

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Garden Design & Ornamental Planting

Craft

Its spreading habit, bright coloring, and long bloom period make it valuable for rock gardens, borders, containers, slopes, and accent plantings. Works well in cottage gardens with a southwestern aesthetic. [source]

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Traditional Ethnobotanical Uses

Medicinal

Glandularia species have been used in traditional Mexican and southwestern Native American herbalism, though scientific validation is limited. Consult herbalists before internal use. [source]

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Butterfly & Pollinator Support

Wildlife

Beyond hummingbirds, the flowers attract butterflies, native bees, and other beneficial pollinators, supporting local ecosystems and garden biodiversity. [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 as a crop plant. For seed collection, allow some flowers to dry on the plant, then collect seed capsules when brown and papery. Seeds can be dried and stored for future propagation.

Fun Facts

  • 🌱 Glandularia pulchella is native to the Chihuahuan Desert and surrounding regions, where it has evolved remarkable heat and drought tolerance that makes it a superstar in southwestern gardens.
  • 🌱 The name 'pulchella' is Latin meaning 'beautiful' or 'pretty,' a fitting tribute to its stunning scarlet flowers that almost glow in intense sunlight.
  • 🌱 This plant is closely related to verbena and vervain, and was previously classified as Verbena pulchella, reflecting ongoing botanical reclassification within the Verbenaceae family.

Gardening Terms

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

Damping Off Deadhead Full Sun Hardening Off Mulch Perennial Transplant
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