Gardenia Plants for Sale

Gardenia is one of the most iconic and beloved plants in Australian gardens. Evergreen, intensely fragrant, and extraordinarily beautiful in flower, it earns its reputation as the go-to choice for gardeners across Victoria, New South Wales, Queensland, and South Australia who want lush foliage, spectacular white blooms, and a fragrance that drifts across an entire garden on warm summer evenings.

Whether you're creating a dense fragrant hedge to line a driveway, a low evergreen border along a pathway, a perfumed courtyard feature, or an elegant pot specimen for a balcony or patio — there's a Gardenia variety perfectly matched to your space, soil, and climate.

Online Plants supplies over 7 premium Gardenia varieties grown by specialist Australian nurseries and delivered directly to your door — healthy, established, and ready to go in the ground. Every plant is backed by our exclusive 30-Day Guarantee to Grow.

Why Gardenia Is Australia's Most Loved Fragrant Shrub

Gardenia augusta and its cultivars have earned a permanent place in Australian gardens for one compelling reason: they deliver on every level.

Their extraordinary fragrance — rich, sweet, and intoxicating — is unmatched by any other commonly grown Australian garden shrub. The blooms themselves are spectacular: pure white, perfectly formed, deeply layered petals set against some of the glossiest, deepest-green foliage of any ornamental shrub. In full flower, a Gardenia is genuinely breathtaking.

Beyond their beauty, Gardenias are evergreen — providing year-round structure, privacy, and foliage interest with no seasonal bare patches. With varieties ranging from low 30cm ground covers to 2.5-metre hedging shrubs, Gardenia suits everything from compact courtyards to expansive garden beds.

They're also versatile performers: tolerating coastal conditions, growing in pots and containers, functioning as formal hedging plants, and thriving as feature specimens. For Australian gardens that demand both function and beauty — few plants deliver as completely as Gardenia.

Which Gardenia Is Right for You? Compare All Varieties

Variety	Height	Spread	Sun	Growth Rate	Best Use
Gardenia Magnifica	1.5–2.5m	1.5–2m	Full/Part	Moderate–Fast	Tall fragrant hedges, privacy screens, feature planting
Gardenia Radicans	30–50cm	60–90cm	Full/Part	Moderate	Ground cover, pathway edging, low borders
Gardenia Aimee Yoshiba	1.5–2m	1–1.5m	Part	Moderate	Feature specimen, fragrance gardens, courtyards
Gardenia Florida	60–100cm	60–100cm	Full/Part	Moderate	Pots, containers, patios, small spaces
Gardenia Golden Magic	1–1.5m	1–1.5m	Full/Part	Moderate	Statement planting, pool surrounds, two-tone display
Gardenia Ocean Pearl	60–100cm	80–120cm	Full/Part	Moderate	Low hedges, borders, extended-season flowering

How Many Gardenia Plants Do I Need for a Hedge or Border?

For a fragrant privacy hedge: Space plants 80cm to 1 metre apart. This gives each plant room to develop naturally while filling the space into a dense, interconnected hedge within 2–3 seasons.

For a formal, clipped hedge: Space plants 60–80cm apart. Closer spacing creates density faster and is ideal where you want a neat, well-defined appearance sooner.

For a low border or edging (Radicans): Space plants 40–50cm apart for an unbroken carpet effect within one full growing season.

Quick calculation: Measure your hedge run in metres, divide by your chosen spacing, then add 1 plant for the final end. For example: a 10-metre hedge at 1m spacing = 11 plants. A 10-metre formal hedge at 0.7m spacing = 15 plants.

How to Plant and Care for Gardenias in Australia

Soil Preparation — The Most Important Step

Gardenias are acid-loving plants and must have the correct soil pH to thrive. Aim for pH 5.0 to 6.5. Before planting, dig in generous amounts of compost, aged manure, or premium acidic potting mix. Critically, avoid planting near concrete paths, walls, or driveways — lime leaching from concrete raises soil pH over time and causes chronic leaf yellowing (chlorosis). In naturally alkaline soils, incorporate sulphur powder or a dedicated acidifier at planting time and retest pH after 6–8 weeks.

Planting

Dig a hole twice as wide and the same depth as the root ball. Backfill with quality compost-enriched acidic soil, firm gently, and water in thoroughly with a seaweed solution to support root establishment. Apply a 7–10cm layer of organic mulch — pine bark, leaf mulch, or sugar cane — over the root zone to retain moisture, regulate soil temperature, and maintain acidic conditions as it breaks down.

Watering

Gardenias need consistently moist but never waterlogged soil. The two most common causes of Gardenia failure in Australia are: (1) allowing the soil to dry out completely during the growing season — which causes bud drop and leaf curl; and (2) overwatering with inadequate drainage — which causes root rot. Water deeply 2–3 times per week during spring and summer, reducing to weekly during the cooler months. A drip irrigation system set on a timer is ideal for maintaining consistent moisture.

Fertilising

Apply a quality fertiliser formulated for acid-loving plants every 8–10 weeks from spring through to early autumn — azalea and camellia fertilisers work perfectly. A liquid seaweed solution applied fortnightly during the growing season improves overall plant health and stress tolerance. Never fertilise in late autumn and winter when plants are resting. Never place fertiliser directly in the planting hole on new plantings.

Pruning

Ideal pruning times are late summer to early autumn (February–April) after the main flowering flush has finished. Light annual pruning maintains compact shape and encourages vigorous new growth for the following season's blooms. Remove spent flowers and any dead or crossing branches. Never cut back into old, hard wood — Gardenias regenerate from soft green growth only. For hedging varieties, begin regular light shaping from a young age rather than allowing plants to reach full size before you start.

Pests to watch for

• Mealy bugs — white cottony clusters at leaf joints and stem bases. Treat with horticultural oil spray (eco-oil) or a systemic insecticide at first sight.
• White wax scale — appears as white lumps on stems. Spray with white oil in summer when scales are in the crawler stage.
• Sooty mould (black leaf coating) — caused by honeydew from scale or mealybugs. Treat the insects causing the problem, not just the mould itself.
• Bud drop — triggered by inconsistent watering, temperature fluctuations, or moving the plant during budding. Maintain consistent conditions throughout the flowering period.

Delivered Fresh from the Grower to Your Door

Every Gardenia plant you order from Online Plants travels directly from our specialist Australian nurseries to your property — no warehousing, no depot delays, no decline in plant health between nursery and home.

Plants arrive established, healthy, and ready to go in the ground the day they arrive. We deliver across Victoria, New South Wales, ACT, Queensland, and South Australia. Due to biosecurity quarantine restrictions, we're currently unable to deliver to Western Australia, Tasmania, or the Northern Territory.

Our 30-Day Guarantee to Grow is simple: if your Gardenia doesn't establish and thrive within 30 days of delivery, we'll make it right. We've been growing and supplying quality plants for over 50 years, and we stand behind every plant we sell.

Frequently Asked Question – FAQs

Are Gardenia plants suitable for Australian climates?

Yes. Gardenias perform exceptionally well across most Australian growing regions — from the temperate gardens of Melbourne and Canberra to the humid subtropics of Brisbane and the warm coastal conditions of Sydney and Adelaide. With the right soil pH, position, and watering,

When do Gardenias flower in Australia?

Most Gardenia varieties flower from late spring through to early autumn — typically October to March — with peak flowering in November through January. Some varieties including Ocean Pearl and Golden Magic have extended flowering periods that continue into winter in warmer climates such as Brisbane and coastal NSW.

Are Gardenias fast growing plants?

Gardenias are moderate growers. Vigorous hedging varieties like Magnifica can reach 1.5–2m in 3–4 seasons with adequate water, feeding, and correct soil pH. Compact varieties like Radicans and Florida are slower but richly ornamental throughout the establishment period and long-lived once settled.

Do Gardenias require a lot of maintenance?

Gardenias are relatively low maintenance once established. Light annual pruning after flowering maintains shape and density. Regular watering during establishment (first 12 months) and feeding every 8–10 weeks with an acid fertiliser keeps plants healthy and prolific. The main ongoing requirement is correct soil pH — check and amend annually if your area has naturally alkaline soils.

Why are my Gardenia leaves turning yellow?

Yellow leaves in Gardenias are almost always caused by high soil pH or iron deficiency — often caused by planting near concrete or using an inappropriate fertiliser. Test soil pH (aim for 5.0–6.5) and apply chelated iron, sulphate of iron, or a dedicated Gardenia acidifier. Regular feeding with an acid plant fertiliser prevents recurrence.