Grevilleas: Choosing the Right One for Your Native Garden
Picture a winter morning in the garden, and one plant is doing all the talking. A grevillea is in full bloom, and the honeyeaters have found it — a dozen of them squabbling over every spider-shaped flower, chattering and flashing through the branches while the whole shrub hums with bees. It is one of the great free shows of Australian gardening. Then you walk into a nursery, see the grevillea table, and the confidence drains away. With more than 350 species and hundreds of cultivars, choosing one can feel genuinely overwhelming. We have planted plenty over the years — some brilliant, a few regrettable — so here is how we now go about picking the right grevillea for the right spot.
Why Grevilleas Belong in Every Australian Native Garden
Grevilleas are the backbone of a good native garden for one simple reason: they work hard and ask for almost nothing. They are proteaceous plants, meaning they belong to the Proteaceae family, so they have specialised proteoid roots that are brilliant at scavenging nutrients from poor soils — and hopeless in rich, heavy ones. Give them well-drained soil, full sun and a light prune, and most will reward you for years. The genus runs from ground-hugging scramblers to forest trees, and the most familiar of the tree forms is Grevillea robusta, the silky oak — that tall, ferny-leaved beauty with golden-orange brushes that turns up in old gardens and streetscapes all over eastern Australia.
Bird-Attracting Powerhouses
If you want birds, you want grevilleas. Their flowers are built for nectar-feeding birds — honeyeaters, wattlebirds, spinebills and lorikeets all work them constantly. The nectar sits in a curved floral tube, so the bird has to reach in, and in doing so picks up pollen on its head and carries it to the next flower. Plant a grevillea and you have effectively installed a bird feeder that never needs refilling. Flowering times vary across species, so a mix of early, mid and late-flowering types can keep food on the table almost year-round.
Drought Tolerance and Climate Suitability
Once established, most grevilleas are genuinely drought-tolerant plants. They evolved through long dry spells and handle water restrictions far better than the exotics we used to plant. That said, “drought-tolerant” is not the same as “indestructible” — a young plant still needs regular water through its first summer or two. The bigger limiting factor is drainage. Grevilleas hate wet feet, and in heavy clay or waterlogged spots they sulk, yellow off and die. Fix the soil first, choose the plant second. There is a grevillea suited to almost every climate in Australia, from the tropics to frosty tablelands, which is exactly what the next section is about.
Know Your Grevillea Types: Ground Covers, Shrubs and Trees
Before you fall in love with a flower, check the growth habit. This is where most planting mistakes happen — a vigorous ground cover planted in a small courtyard, or a tree-form grevillea squeezed against a fence. Grevilleas broadly fall into three groups, and matching the habit to your space is the single most useful decision you will make.
Prostrate and Ground Cover Grevilleas
These are the problem-solvers: embankments, nature strips, spilling over retaining walls, or carpeting a bare patch where nothing else thrives. They spread rather than climb, and many flower heavily across the whole mat of foliage. Grevillea ‘Bronze Rambler’ is one of the most vigorous — it will cover a serious amount of ground, with bronzy new growth and dense red toothbrush flowers. Give it room, because it does not do “restrained”.
Medium to Tall Shrubs
This is the sweet spot for most gardens. Shrubs from about one to three metres give you screening, structure and a long flowering season without overwhelming a suburban block. Grevillea ‘Moonlight’ is a classic tall shrub with large creamy-white flowers that glow in evening light, and it is reliable in most temperate areas. Grevillea ‘Robyn Gordon’ and Grevillea ‘Superb’ sit in the same bracket and are almost foolproof in a sunny, well-drained bed.
Tree-Form Grevilleas for Larger Blocks
If you have the space, tree grevilleas are magnificent. Grevillea robusta is the best known, growing into a tall, stately tree with fern-like foliage and golden flower spikes in spring. It is fast-growing and makes a superb shade or screen tree on a large block, though it drops leaf litter and its roots can be assertive, so keep it away from pipes and paving. Other tree forms, such as the Queensland rainforest species, offer dense canopies and wonderful wildlife value for bigger properties.
Matching Grevilleas to Your Climate and Soil
The grevillea that thrives in Cairns is not the one that thrives in Ballarat. Species come from wildly different parts of the country, and the closer you match your plant to your local conditions, the less work you will do. Rainfall, humidity, frost and soil type are the four things to weigh up.
Tropical and Subtropical Picks
In the humid north, choose species that evolved in rainforest and wet tropics rather than the dry inland types, which tend to struggle with constant moisture. Grevillea baileyana is a good example — a tropical species with handsome foliage and cream flowers. Even so, humidity brings the risk of root rot, which is why grafting matters so much in these regions (more on that below).
Temperate and Cool-Climate Choices
In southern Australia, frost tolerance becomes the priority. Grevillea rosmarinifolia is a tough, fine-leaved shrub that handles cold and dry conditions beautifully, and it is a parent of many hardy cultivars. In cool-climate gardens, plant in spring once the worst of the frost has passed, and choose species from the southern tablelands or western slopes rather than the tropics.
Soil Preparation and Drainage
Free-draining soil is non-negotiable. In sandy soils you are usually fine; in clay, you need to create a raised mound or a raised bed so water never sits around the roots. Our standard approach:
- Dig a hole twice as wide as the pot but no deeper — grevilleas sit best slightly proud of the surrounding soil.
- Blend native potting mix with coarse sand or fine gravel to open up heavy soil.
- Plant on a slight mound so surface water runs away from the crown.
- Mulch lightly with coarse bark, keeping it clear of the trunk.
- Water in well, then let the soil dry between waterings.
Flower Colours, Shapes and Bush Tucker Potential
This is where grevilleas become addictive. Flowers range from lipstick reds and soft pinks to creams, apricots, golds and — most surprisingly — greens. Shapes vary too, from upright “toothbrush” spikes to hanging spider clusters and delicate curved combs. You can build an entire garden colour scheme around grevilleas alone.
Classic Reds, Pinks and Creams
Red and pink grevilleas are the crowd-pleasers and the best bird magnets, because honeyeaters key in on warm colours. Creams and whites, like those of Grevillea ‘Moonlight’, are softer and work beautifully against grey-green foliage or a dark fence.
Unusual Greens and Yellows
Green flowers sound odd until you see them. Grevillea ‘Green Glow’ produces striking lime-green blooms that look almost luminous against the foliage, and they make a wonderful, unexpected accent in a native border. Yellows and golds, including the golden spikes of Grevillea robusta, add warmth and pair well with purple-flowering plants like hardenbergia.
Grevilleas as Bush Tucker
Grevilleas have long been part of Aboriginal bush tucker traditions — the flowers are steeped in water or sucked directly for their sweet nectar. Grevillea juncifolia, the honey grevillea of inland Australia, is especially valued for its abundant, intensely sweet nectar. If you are planting a bush tucker garden, it is a wonderful species to include, both for the flavour and for the story it carries. Always harvest respectfully and sparingly, and never take from plants in the wild without permission.
Planting, Pruning and Caring for Your Grevillea
Get the aftercare right and a grevillea will outlive most of what you planted around it. The main rules are simple: plant at the right time, feed it the native way, and prune lightly but regularly.
When and How to Plant
Autumn and spring are the two windows we aim for. Autumn lets roots establish through the cooler months before summer heat arrives; spring works well in frost-free and tropical areas. Dig a hole wider than the root ball, keep the crown slightly above soil level, backfill with free-draining mix, water in and mulch. Avoid disturbing the roots more than necessary — grevilleas resent rough handling.
Fertilising the Native Way
This is the one that catches people out. Grevilleas are phosphorus-sensitive, and standard garden fertilisers can kill them. Use a fertiliser formulated for Australian natives, apply it lightly in spring, and never dump it against the trunk. If in doubt, skip it — a well-mulched grevillea in decent soil rarely needs much feeding at all.
Pruning for Health and Shape
Prune lightly after flowering to keep the plant bushy and to stop it going leggy and woody. Take off no more than about a third, and always cut back to a leaf or shoot rather than into bare old wood, which many grevilleas will not reshoot from. A light tip prune on young plants in their first couple of years pays off enormously later.
One extra trick worth knowing: grafting. Fussy species that rot in humid conditions can be grafted onto Grevillea robusta rootstock, which is far more tolerant of wet, warm soils. This is how many of the spectacular tropical and Western Australian grevilleas are grown successfully in coastal Queensland and northern New South Wales. If you garden in a humid area and have lost grevilleas before, look for grafted plants at the nursery.
Our Top Grevillea Picks for Australian Gardens
After years of trial and error in our own gardens, these are the ones we keep coming back to. They are tried and tested, widely available, and forgiving of the mistakes beginners make.
- Grevillea ‘Superb’ — a compact shrub to about 1.5 metres with orange-red flowers almost year-round. Brilliant in a small garden or large pot.
- Grevillea ‘Robyn Gordon’ — the classic red-flowered shrub, tough, long-flowering and a magnet for honeyeaters. Hard to beat for reliability.
- Grevillea lanigera ‘Mt Tamboritha’ — a dense, low-growing form with soft grey-green foliage and pink-cream spider flowers. Perfect for rockeries, borders and pots.
- Grevillea ‘Moonlight’ — a tall shrub with big creamy-white flowers, ideal as a screen or backdrop.
- Grevillea ‘Bronze Rambler’ — the go-to ground cover for embankments and large open areas.
Start with one of these and you will quickly learn what your patch of Australia can do.
You do not need a whole grevillea collection to make a difference. Start with a single well-suited plant — matched to your climate, your soil and the space you actually have — and you will bring birds, colour and movement into your native garden within a season. From there, it is very hard to stop at one.
Frequently Asked Questions
Are grevilleas drought-tolerant?
Yes — once established, most grevilleas are excellent drought-tolerant plants and will cope with long dry spells and water restrictions. Young plants still need regular watering through their first summer or two while the roots establish, and even mature plants appreciate a deep soak during extreme heat.
Why is my grevillea dying or turning yellow?
The most common causes are poor drainage, overwatering, or the wrong fertiliser. Grevilleas hate sitting in wet soil and are phosphorus-sensitive, so standard garden fertilisers can poison them. Check that water drains freely away from the roots, cut back on watering, and switch to a native-specific fertiliser — or none at all.
Can I grow grevilleas in humid areas like coastal Queensland?
You can, but choose carefully. Many inland and Western Australian species rot in humid conditions. Look for tropical species such as Grevillea baileyana, or buy grafted plants — grafting onto Grevillea robusta rootstock gives fussy grevilleas a root system that tolerates warm, wet soils.
When should I prune a grevillea?
Prune lightly straight after flowering finishes. Remove no more than about a third of the growth and always cut back to a leaf or active shoot, never into bare old wood, because many grevilleas will not reshoot from it. Regular light tip pruning keeps plants dense and stops them going leggy.
Which grevillea is best for attracting birds?
Any grevillea with plenty of nectar will bring in honeyeaters, but red and pink-flowered forms tend to be the strongest magnets. Grevillea ‘Robyn Gordon’ and Grevillea ‘Superb’ are two of the most reliable bird-attracting shrubs we grow, flowering over a long season and producing generous nectar.