Scotts Osmocote® Plus Trace Elements: Roses, Gardenias, Azaleas & Camellias

A set and forget controlled release plant food for those who don't have the time or inclination to tend every plant or garden bed individually. The smart way to fertilise - specially formulated for acid-loving plants and feeds continuously for up to six months.

  • Ideal for all plants that grow best in acid soils ('sour' soils) and with acidic fertilisers (pH 5.2 or less to 6.2), including magnolias, pieris and blueberries
  • Two easy applications a year - in early Spring and again in early Autumn
  • Releases nutrients at the same rate plants are able to take them up through the roots - no wastage or run-off into waterways and drains
  • Includes a wetting agent to help water and nutrients soak in to the soil
  • Releases fertiliser continuously for up to six months

Feeds when plants need it

The release of nutrients depends on temperature - more when it's warm and plants are growing and less when it's cold and growth is slow

Sustainable & environment friendly

Scotts Osmocote® uses advanced prill technology that ensures even and controlled nutrient release with no wastage

Controlled release mean feeding less often and more effectively; less frequent feeding is more economical and environment-friendly

Wetting agent

The added wetting agent improves water absorption into the soil or potting mix and helps plants take up nutrients

Boosted iron

Keeps leaves greener for longer


500g, 700g, 1kg and 2kg tubs

Suitable for

All plants in the garden or in pots preferring an acid soil or potting mix and fertiliser (pH 5.2 - 6.2)

Roses in the ground and in pots

Safe to use on new plants - the controlled release of nutrients means it will not burn soft leaves or tender young roots

Not suitable for

Do not use for plants preferring a neutral to alkaline soil and fertiliser (pH 7 and above)

Do not use in hydroponic growing systems, ponds or pots submerged in water

Do not use on lawns - use only specifically named fertilisers on grassed areas

How it works

  • The release of nutrients from the fertiliser depends on soil temperature, not soil moisture
  • When the weather is warm in Spring, Summer and early Autumn, plants need more food and the fertiliser releases quicker
  • In Winter, when soil and air temperatures are lower, plants need less food because their growth rate is reduced, and less plant food is released

How to use

  • Roses, Gardenias, Azaleas & Camellias will promote healthy growth and beautiful flowers on roses and other acid-loving plants
  • Use the rates in the table below as a guide for how much to apply OR broadcast over beds using 50-80g/m2

 Application Rates

Area Planting Maintenance
Roses, Azaleas, Camellias, Gardenias, Rhododendrons & other acid loving plants 10cm pot = 2 TBL

15cm pot = 3 TBL

20cm pot = 4 TBL
Years 1-3 6 TBL per bush

Year 4 onwards 10 TBL per bush

Note: TBL - tablespoon = 15g

  • Established plants - sprinkle Scotts Osmocote® in a band around the dripline on the soil (beneath outer perimeter of the leaf canopy) once a year and cover with mulch. This is where the feeding roots will be, not close in to the trunk
  • Pots - sprinkle at recommended rate over potting mix and cover lightly with mulch
  • Self-watering pots - make 10cm deep holes in the potting mix with a pencil or long skewer a few centimetres in from the rim of the pot and fill with columns of Scotts Osmocote®. Water from the top once or twice to start the feeding process.
  • The number of holes will depend on the size of the pot - as a guide, three equally spaced holes would be enough for a 20cm diameter pot.

For a complete guide on how to use Scotts Osmocote® Plus Trace Elements Roses, Gardenias, Azaleas & Camellias, watch the video on this page and always check the packaging.

When to use

  • Add to soils at planting time
  • Apply in early Spring, when soils are warming and plants are putting on new growth and repeat in early Autumn

Safety Information

CAUTION: This product may cause staining of hard surfaces if wet. Avoid contact with hard surfaces and if contact does occur, sweep off immediately.

Technical details

  • NPK 17.7 : 2 : 5.8
  • Includes boosted iron and essential trace elements
  • Specially formulated for acid-lovers - plants preferring a soil pH from around pH to pH 6.2, where pH is neutral and numbers above 7 are alkaline.
  • May be used safely on food plants, for example blueberries
  • Scotts Osmocote® is a controlled release fertiliser that consists of prills (small beads) of high quality fertiliser encased in a permeable and biodegradable soy extract coating
  • Each prill contains a balanced micro dose of nutrients so a plant's response from an application is reliable and consistent

Where to buy it

Decided what product best suits your needs? Or would you prefer to go in-store to ask for more information?

Visit your local Bunnings Warehouse for our largest range.

You can also find Scotts products in a number of gardening, hardware, independent and supermarket retailers including Flower Power, Mitre10, Coles and Woolworths.

Note: Not all brands and products are stocked in all stores. For any additional questions please visit our contact us page.

In New Zealand, go to your local Bunnings warehouse

Tips, tricks & advice

How to pot a plant

Gardening in pots can be fun and rewarding. The secret to success is knowing how to pot up a plant!

Read more

How to establish a new garden bed

Step by step guide to establishing new garden beds including:

Read more

Other products you might need

Scotts Osmocote® Professional Rose, Gardenia, Azalea & Camellia Mix


A superior quality potting mix specially formulated for roses and other plants that need acid ('sour') growing conditions

Scotts Osmocote® Plus Organics Roses, Gardenias & Azaleas Plant Food & Soil Improver


Special formulation of traditional Scotts Osmocote® and blended organics for roses and other plants that grow and flower best in an acidic ('sour') soil. Feeds the plant as well as the soil

Scotts Osmocote® Boost+Feed Roses, Gardenias, Azaleas & Camellias


Easy to use, double action liquid plant food for roses, gardenias, rhododendrons and similar shrubs that prefer an acid ('sour') fertiliser and soil to perform well

Scotts Pure Organic All Purpose Premium Plant Food


This slow-release, granular, organic fertiliser feeds your plants for up to 3 months, so your plants receive just the right amount of nutrients. It’s the natural way to grow delicious food and beautiful blooms.