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How to Grow Grevillea Red

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Grevillea Red

Grevillea × 'Red'

shrub

Grevillea Red is a hybrid evergreen shrub prized for its striking bright red, needle-like flower spikes that attract hummingbirds and other pollinators. Native to Australia, this ornamental shrub features feathery foliage and produces blooms nearly year-round in mild climates. It's an excellent choice for xeric gardens and landscapes requiring minimal water once established.

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Example Grevillea Red timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Grevillea Red

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Grevillea Red

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Grevillea Red dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily (tolerates partial shade in hot climates)
💧
Water: Low water needs once established; water regularly during first growing season to establish deep roots. In mature plants, water deeply but infrequently. Drought tolerant once established; avoid overwatering.
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Spacing: 36-48 inches
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Days to maturity: Not applicable (ornamental shrub; flowering begins 1-2 years from transplant)
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Planting depth: Plant at same depth as root ball; avoid burying stem

Soil

Type: Well-draining sandy or gravelly loam
pH: 6.0-7.5
Amendments:
Coarse sand or perlite for drainage Minimal compost (avoid excessive organic matter) Mulch lightly with gravel or coarse bark

Growing Zones

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Thrives in zones 9-11; tolerates zone 8b with protection

9a 9b 10a 10b 11a 11b

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Growth Stages

1

Establishment

6-12 months

Young transplant developing root system with initial shoot growth

Water regularly to keep soil moist (not waterlogged) for 6-12 months. Avoid fertilizing; apply light mulch layer. Shelter from harsh winds if young.

2

Vegetative Growth

6-18 months

Plant develops bushy form with feathery green foliage; no flowers yet

Water moderately as needed. Light pruning to shape form. Avoid heavy pruning; Grevilleas prefer minimal cutting. No fertilizer needed.

3

Flowering

2-4 months (can recur multiple times per year)

Bright red needle-like flower spikes emerge from branch tips, attracting hummingbirds

Continue regular watering during bloom. Deadhead spent flowers to encourage continued blooming. No fertilizer necessary.

4

Peak Production

Ongoing (mature phase, years 3+)

Mature shrub producing abundant red flower spikes with dense foliage

Water deeply but infrequently. Minimal pruning; only remove dead wood or shape lightly. Monitor for pests. Very drought tolerant.

Companion Planting

Plan your garden →

Plant with:

Desert rose Lantana Salvia Rosemary Texas sage Desert marigold Russian sage Blanket flower

Avoid planting near:

Plants requiring consistent moisture Heavy feeders that may deplete soil Lawns requiring frequent irrigation

Common Pests

  • Spray with water to dislodge; use horticultural oil or miticide if severe. Maintain adequate humidity around plant.

  • Remove with insecticidal soap; prune infested branches. Improve air circulation around plant.

  • Prune affected branches; apply horticultural oil during dormant season. Hand-remove if infestation is minor.

  • Spray with insecticidal soap or neem oil. Avoid excessive nitrogen fertilization which encourages infestations.

Uses

🍳

Nectar Source

Culinary

While not directly consumed, Grevillea Red produces abundant nectar that attracts hummingbirds and beneficial pollinators to gardens, supporting food web health. [source]

🦋

Pollinator Attraction

Wildlife

The red flowers are highly attractive to hummingbirds, honeyeaters, and native Australian birds, making it an excellent choice for wildlife gardens and supporting avian biodiversity. [source]

🏠

Cut Flower Arrangements

Household

Long-lasting red flower spikes are prized for fresh and dried floral arrangements, adding exotic color and texture to bouquets and decorative displays. [source]

🎨

Dried Arrangements

Craft

Flower spikes dry well and retain color, making them suitable for dried floral crafts, wreaths, and long-term decorative arrangements. [source]

🏠

Xeric Landscaping

Household

Excellent for drought-tolerant, low-maintenance gardens in arid and semi-arid climates, reducing water consumption while providing year-round color. [source]

Harvest Tips

Grevillea Red is ornamental; cut flowers are long-lasting in arrangements. Clip flower spikes in morning when fully open. Cut stems at 45-degree angle 1-2 inches below flower base. Flowers can last 2-3 weeks in water.

Fun Facts

  • 🌱 Grevillea is native to Australia and the name honors Charles Francis Greville, an 18th-century British botanist and plant collector.
  • 🌱 Grevillea Red blooms prolifically for much of the year in warm climates, sometimes producing flowers even during winter months in zones 10-11.
  • 🌱 The distinctive 'toothbrush' flower structure is perfectly adapted for hummingbird pollination, with pollen depositing on the bird's forehead during feeding.

Gardening Terms

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

Deadhead Full Sun Hybrid Mulch Partial Shade Transplant
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