How to Grow Stirlingia

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Stirlingia

Stirlingia latifolia

shrub

Stirlingia is an Australian native evergreen shrub known for its striking cylindrical flower spikes with distinctive red and yellow or cream coloring. It belongs to the Proteaceae family and is prized by native plant enthusiasts and florists for its unique, long-lasting blooms. The plant develops a woody structure with narrow, linear foliage and produces flowers that can last several weeks.

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Example Stirlingia timeline · Pittsburgh, PA (Zone 6b)

Plant Stirlingia
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Stirlingia
Late summer into fall

Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily; tolerates partial shade but flowers best in full sun

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Water: Drought tolerant once established; water moderately during growing season. Reduce watering in winter. Sensitive to overwatering and poor drainage—avoid wet feet

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Spacing: 36 inches

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Days to maturity: N/A (woody shrub; flowering begins in 2-3 years from established plant)

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Planting depth: Plant at same depth as root ball; keep crown slightly above soil line

Soil

Type: Well-draining sandy or gravelly soil; tolerates poor soils

pH: 5.5-6.5

Amendments:

Coarse sand or gravel to improve drainage Avoid rich organic matter and fertilizers Add perlite or pumice for sandy mix

Growing Zones

Find your zone →

Thrives in zones 9b-11; tolerates light frost but prefers warm climates

9b 10a 10b 11

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Growth Stages

Establishment

6-12 months

Young shrub developing root system and woody framework with linear foliage

Water regularly but carefully to avoid waterlogging. Provide well-draining soil. Shelter from harsh winds in first year

Vegetative Growth

1-2 years

Shrub develops woody stems and dense linear leaves; no flowers yet

Minimal fertilizer needed. Light pruning to shape if desired. Maintain good drainage. Avoid heavy organic amendments

Flowering

4-8 weeks per bloom cycle

Distinctive cylindrical flower spikes appear, typically red with yellow or cream tips; spikes elongate over weeks

Do not deadhead unless harvesting for cut flowers. Maintain consistent (but not wet) soil moisture during bloom. Flowering typically spring to summer

Post-Bloom

Variable; 2-3 months

Flowers fade and seed pods develop; plant enters rest period

Reduce watering. Allow seed pods to mature if desired for propagation. Minimal intervention needed

Companion Planting

Plan your garden →

Plant with:

Banksia Kangaroo Paw Bottlebrush Australian Grevillea Native grasses Lavender

Avoid planting near:

Heavy feeders (nitrogen-loving plants) Plants requiring frequent watering and rich soils Phytophthora-susceptible plants if drainage is poor

Common Pests

Improve drainage immediately; reduce watering; may require root removal or replanting in well-draining medium. Use fungicide soil drench if available
Increase humidity with occasional misting; spray with water or neem oil if severe; ensure good air circulation
Spray with horticultural oil or insecticidal soap; prune heavily infested branches
and (fungal)
Remove affected foliage; improve air circulation; avoid overhead watering; apply copper fungicide if widespread

Uses

🍳

Ornamental Cut Flowers

Culinary

Stirlingia flowers are prized by florists and in floral arrangements for their unique texture and long vase life (2-3 weeks). They add architectural interest to bouquets and dried arrangements. [source]

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Nectar for Native Pollinators

Wildlife

The dense flower spikes provide nectar for native Australian birds, particularly honeyeaters and lorikeets, and attract native bees. It supports local pollinator populations in appropriate regions. [source]

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Dried Flower Arrangements

Household

Flower spikes dry beautifully and retain color and structure, making them ideal for long-lasting dried arrangements, wreaths, and craft projects. [source]

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Native Plant Landscaping

Craft

Stirlingia is used in Australian native plant gardens, xeriscapes, and low-water landscapes for year-round structure and seasonal interest without requiring high inputs. [source]

Harvest Tips

Cut flower spikes when they reach desired length and color intensity (typically after 2-3 weeks of bloom development). Cut at the base of the spike using clean, sharp secateurs. Spikes last 2-3 weeks in a vase with fresh water. Do not harvest excessively from young plants; wait until established

Fun Facts

🌱 Stirlingia is endemic to Western Australia and is part of the Proteaceae family, which includes over 1,600 species adapted to nutrient-poor, well-drained soils
🌱 The plant's ability to thrive in poor soils is due to associations with mycorrhizal fungi that help it access nutrients, making it sensitive to artificial fertilizers and disturbed soil
🌱 Stirlingia flowers are highly prized in the native Australian cut flower industry and are exported globally for high-end floral arrangements

Gardening Terms

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

Amendment Deadhead Full Sun Native Plant Partial Shade

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