← Plant Guides

How to Grow Orange Marmalade Grevillea

Wikimedia Commons

Orange Marmalade Grevillea

Grevillea juniperina 'Orange Marmalade'

shrub

A compact, ornamental Australian native shrub celebrated for its vibrant orange-red needle-like flowers that bloom profusely throughout the year. This cultivar of Grevillea juniperina features fine, feathery foliage and is prized for attracting nectar-feeding birds and beneficial pollinators to gardens. It's a hardy, low-maintenance shrub ideal for Mediterranean, xeriscape, and native plant gardens.

When should you plant Orange Marmalade Grevillea 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 Orange Marmalade Grevillea timeline →

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

  1. Plant Orange Marmalade Grevillea

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Orange Marmalade Grevillea

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; performs best with afternoon sun exposure
💧
Water: Low to moderate water needs once established; drought-tolerant. Water regularly during first growing season to establish deep roots. In established plants, water deeply but infrequently; reduce watering in winter. Avoid overwatering, which promotes root rot.
📏
Spacing: 36 inches
📅
Days to maturity: 12-18 months to reach ornamental maturity
🌱
Planting depth: Plant at same depth as nursery container; do not bury crown

Soil

Type: Well-draining sandy or gravelly loam; tolerates poor, infertile soils
pH: 5.5-7.0
Amendments:
Coarse sand Perlite or pumice for drainage Avoid heavy compost or fertilizer-rich soils

Growing Zones

Find your zone →

Thrives in USDA zones 9-11; tolerates light frost in zone 9a with protection

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

Sign up free to see if Orange Marmalade Grevillea grows in your zone — and get a personalized planting timeline.

Get my Orange Marmalade Grevillea timeline →

Growth Stages

1

Establishment

2-3 months

Young transplant developing root system and acclimating to garden conditions

Water regularly to keep soil consistently moist (not waterlogged) for first 2-3 months. Provide afternoon shade in very hot climates. Avoid fertilizing; native Australian plants are sensitive to high phosphorus.

2

Vegetative Growth

4-8 months

Plant develops dense, fine-textured needle-like foliage and establishes branching structure

Reduce watering frequency as roots deepen. Light pruning after flowering encourages bushier growth. Do not use high-nitrogen fertilizers. Apply well-draining mulch (coarse sand, gravel) around base.

3

Early Flowering

Ongoing year-round, peaks in spring and fall

First distinctive orange-red clustered flowers appear along branches

Maintain consistent watering during blooming. Deadhead spent flowers to encourage continuous flowering. Avoid pruning heavily during flowering season.

4

Peak Production

Year 2+ ongoing

Mature shrub produces abundant orange-red flower spikes throughout the year, especially in cooler months

Minimal watering needed in established plants (drought-tolerant). Light to moderate pruning after main flowering cycles keeps plant compact and encourages denser flowering. Mulch to suppress weeds and retain soil moisture.

5

Maintenance

Year 3+ indefinitely

Established, mature shrub requiring only occasional pruning and minimal intervention

Prune lightly to shape and remove dead wood; avoid heavy cutting as recovery is slow. No fertilizing needed. Water only during extended drought. Monitor for pests but generally very healthy.

Companion Planting

Plan your garden →

Plant with:

Westringia rosmariniformis (Australian Rosemary) Hakea species Leptospermum (Tea Tree) Brachyscome Eremophila Salvia greggii Lavender (Lavandula) Santolina Other native Australian shrubs

Avoid planting near:

Heavy feeders requiring rich, fertilized soil Water-loving plants requiring frequent irrigation Plants sensitive to low-phosphorus conditions Allelopathic plants like black walnut Aggressive spreaders that compete for nutrients

Common Pests

  • Spray with water to dislodge; use horticultural oil or insecticidal soap if severe; improve air circulation

  • Remove with soft brush or cloth; apply horticultural oil in late winter or early spring before growth

  • Improve air circulation; remove affected leaves; avoid overhead watering; fungicide rarely needed

  • Ensure excellent drainage; never overwater; remove infected plants; improve soil drainage with amendments

Uses

🦋

Pollinator and Bird Magnet

Wildlife

The abundant orange-red flowers are highly attractive to native birds (particularly honeyeaters and lorikeets), bees, and other nectar-feeding insects. This makes it an excellent choice for supporting local wildlife and maintaining biodiversity in gardens. [source]

🎨

Cut and Dried Flowers

Craft

The striking flower spikes last well in fresh cut arrangements and dry beautifully for long-lasting dried floral displays. The distinctive shape and vibrant color make them popular in floral design and craft arrangements. [source]

🏠

Ornamental Landscape Design

Household

This compact cultivar is ideal for Mediterranean gardens, xeriscape landscapes, rock gardens, and native plant gardens. Its low-maintenance nature and year-round flowering make it excellent for modern sustainable garden designs. [source]

🍳

Grevillea Honey

Culinary

While not directly consumable, Grevillea flowers are a significant nectar source for bees, contributing to distinctive floral honey with unique flavor profiles. Some regions market honey specifically from Grevillea nectar. [source]

💊

Traditional Aboriginal Uses

Medicinal

Native Australian Grevillea species have been used in traditional Aboriginal medicine and practices, though specific medicinal applications of 'Orange Marmalade' cultivar are not well-documented in modern herbalism. [source]

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

Harvest Tips

This is an ornamental shrub grown for flowers and foliage, not harvested for food or material crops. Cut flowering stems for fresh arrangements or dried flower displays. Prune lightly after main flowering cycles (typically late spring or fall) to encourage denser branching and more abundant future flowers.

Fun Facts

  • 🌱 The genus Grevillea contains over 360 species, nearly all endemic to Australia, making it one of Australia's most iconic native plant groups.
  • 🌱 'Orange Marmalade' is a modern cultivar selected specifically for its prolific flowering, compact growth habit, and vibrant color—traits not present to the same degree in wild Grevillea juniperina populations.
  • 🌱 Grevillea flowers have a unique brush-like appearance due to their distinctive style and stamens, which has earned them the common name 'Silky Oak' in some regions, though they are not actually oaks at all.

Gardening Terms

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

Cultivar Deadhead Full Sun Mulch Native Plant pH Transplant
Shop Orange Marmalade Grevillea plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Orange Marmalade Grevillea planting timeline

Tell us your zip code and we'll calculate exactly when to start Orange Marmalade Grevillea 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 Orange Marmalade Grevillea timeline →