Grevillea juniperina | Australian Native Grow and Care Guide

Prized as one of the most cultivated parent plants for grevillea and other garden hybrids, Grevillea juniperina features prickly leaves, striking spidery flowers that can last throughout most of the year and an attractive erect growth habit. 

The spider-like blooms are borne in clusters of paired flowers that can be orange, red, yellow or pink in colour. If you’re anything like me and adore our gorgeous grevilleas, this species is certainly a must-have addition to your garden. 

Today, I will be explaining how you can grow and care for this special grevillea species.

Introducing Grevillea juniperina

With the ability to adapt readily to cultivation, this plant can add exceptional texture and long-lasting colour to outdoor spaces. Enjoy long-flowering periods, dense foliage and hassle-free gardening. 

Part of the Proteaceae family, this species is native to eastern New South Wales and south-eastern Queensland. Its common names include the Juniper or Juniper-Leaf Grevillea or the Prickly Spider Flower. 

Depending on its form, it will reach about 1 to 4 metres tall and 1.5 to 6 metres wide in gardens. Forms range from ground cover to full shrubs. 

Grevillea juniperina is a fantastic bird-attracting plant thanks to its nectar-rich blooms. 

The most popular cultivars include:

• Molonglo
• New Blood
• Poorinda Queen

How to Grow Grevillea juniperina

This species is best propagated using cuttings or with seeds. Cuttings will ensure the same characteristics are inherited from the parent plant. Take cuttings from the current season’s growth and pot into quality potting soil. 

Seeds are best nicked with a sharp knife to expose the embryo and then sown into a quality seed-raising mix. 

Idea Conditions for Planting Prickly Spider Flower

Sunlight

This plant prefers full sun but can tolerate dappled shade. Sunny positions will ensure a hardier nature. 

Soil

Can tolerate a wide range of soils so long as the soil is well-draining. It prefers heavier soils like clay but can withstand sandy soil too. A rich loam soil can also work perfectly.

Temperatures

Lower winter temperatures will promote more prolific flowering. 

Grevillea juniperina Care Tips

Once established, this shrub is very tough and tolerant to drought. 

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Pruning Juniper-Leaf Grevillea

Lightly prune after flowering to maintain a dense growth habit. Direct contact with the plant can cause skin irritation so be sure to wear protective gardening gloves. Can tolerate heavier pruning for topiary or hedging. 

Watering

These water-wise plants need extra care in their first two years then water about once or twice a week on average depending on rainfall. 

Fertilising Needs

Though not necessary, you can apply a dose of slow-release low-phosphorus fertiliser in spring to encourage growth and flowering. A native blend fertiliser can also work well.  

Mulching Prickly Spider Flower

Add a layer of organic mulch around the base of the plant in summer for soil moisture retention and to suppress weeds. 

Pests and Disease

This species is generally pest and disease free.

Grevillea juniperina Frequently Asked Questions

Are Grevillea juniperina plants prickly?

Yes, the Australian native prickly-leaved Grevillea juniperina produces spiky, needle-like leaves that can cause skin irritation. 

What do grevillea plants symbolise?

These hardy natives symbolises boldness, strength and courage.

What is the longevity of Grevillea juniperina?

These fast-growing shrubs can live between 50 and 65 years if well cared for. 

For more information on grevilleas, be sure to refer to our in-depth guide below:

• Grevilleas – Gardener’s Guide to Growing This Australian Native

Galvanise Your Gardens Native Spectacle with Grevillea juniperina

If you’re an admirer of grevilleas, this species is a must-have. Grevillea juniperina offers long-lasting flowers, highly textured foliage and a variety of forms to match almost any landscaping application.

The spidery blooms are brilliant and offer lengthy bursts of colour to gardens while attracting beautiful birdlife. Enjoy one of the most cultivated in its genus with Grevillea juniperina.