Water Soluble Fertiliser

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Water Soluble Fertiliser

Shop our range of water soluble fertiliser for fast, flexible plant feeding. Choose from complete soluble NPK fertilisers and individual nutrients including calcium nitrate, potassium nitrate, MKP and other specialist formulas for gardens, horticulture, fertigation and hydroponics.

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Potassium Nitrate Greenhouse/Technical Grade is a fully soluble fertiliser containing Nitrogen and Potassium, recommended for vegetables, fruits, flowers, tu...
Potassium Nitrate Greenhouse-Technical Grade Soluble Powder | Campbells
$11.00
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Calcium Nitrate is a top-dress water-soluble fertiliser that provides nitrogen and calcium nutrition for vegetables, fruits, vines, flowers, turf, lawns and ...
Calcium Nitrate Greenhouse Grade (Campbells)
$5.00
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A fully soluble fertilizer containing nitrogen, phosphorus, potassium, sulphur, magnesium and trace elements recommended for vegetables, fruits, flowers, tur...
Campbells Diamond Special T Water Soluble NPK Fertiliser
$15.00
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Mono Potassium Phosphate is a soluble PK fertiliser for fertigation with high levels of Phosphorus and Potassium. An extremely pure monopotassium phosphate. ...
Mono Potassium Phosphate (MKP)
$13.00
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Potassium Chloride Soluble (MOP) (WSM)  NPK = 0-0-60 Potassium Chloride (KCI) = 97% Potassium Oxide (K2O) = 60%-61.3% Potassium chloride (KCl) is a metal hal...
Potassium Chloride Soluble (MOP) (WSM)
$10.00
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Campbell Orchid Fertiliser A (Yellow) is a water-soluble orchid fertiliser formulated for the flowering stage of the orchid growth cycle. With an NPK analysi...
Campbell Orchid Fertiliser A | For Flowering (Yellow)
$19.95
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Campbell Orchid Fertiliser B (Blue) is a high-nitrogen, water-soluble orchid fertiliser formulated to support strong vegetative growth and plant development ...
Campbell Orchid Fertiliser B | For Growth (Blue)
$19.95
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Peters Professional Allrounder is a favourite among a wide variety of plants. This versatile fertiliser delivers rapid growth in potted plants, bedding displ...
Peters Professional All Rounder Soluble NPK Fertiliser
$14.95
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Peters® Professional Blossom Booster is a high-quality, water-soluble fertiliser specially formulated to encourage the development of more flower buds and he...
Peters Professional Blossom Booster | Soluble NPK Flower Fertiliser with TE
$19.00
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With an N:K ratio that will boost growth, CalMag Grower is a unique product specially formulated for soft water. Your plants will benefit from a continuous s...
Peters Excel CalMag GROWER | Soluble NPK Fertiliser
$14.00
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If you irrigate with soft water, Peters Excel CalMag Finisher is developed especially for you. It’s the perfect step on from Peters Excel CalMag Grower 15-5-...
Peters Excel CalMag FINISHER | Soluble NPK Fertiliser
$14.00
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Yates Thrive, the trusted name in soluble plant food, now offers you the total solution to achieve beautiful, healthy plants, pots and lawns. Thrive Soluble ...
Thrive Soluble All Purpose Plant Food | Fertiliser
$16.00
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Yates Aquasol Soluble Plant Food with Trace Elements. A balanced, fast-acting, general-purpose fertiliser. Suitable for growing all types of plants, includin...
Aquasol Soluble Plant Food Fertiliser
$14.00
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Yates Thrive Flower + Fruit Soluble Fertiliser is a healthy, fast, nourishing plant food for abundant flowers & prolific fruit and vegies. As a trusted n...
Thrive Flower+Fruit Soluble Fertiliser 500g
$15.00
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Manutec Tomato Food Soluble Fertiliser 500g. Description: Manutec Tomato Food is a fast-acting water-soluble concentrate developed specifically for Tomato pl...
Manutec Tomato Food Soluble Fertiliser 500g
$17.95
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Manutec Fruit & Citrus Food Soluble 500g Specially formulated for fruit plants with added trace elements. N.P.K:  25.3 / 6.7 / 11.10
Manutec Fruit & Citrus Food Soluble 500g
$14.79
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Searles Flourish is a concentrated, completely soluble plant food formulated with premium ingredients providing plants with fast-acting nutrients for healthy...
Searles Flourish Cacti & Succulent Soluble Plant Food 500g
$10.94
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Manutec Zinc Sulphate soluble powder is a corrective element used to correct Zinc deficiencies that are common in fruits, citrus and vegetables, especially u...
Manutec Zinc Sulphate Soluble 500 grams | Trace Fertiliser
$13.50
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A soluble source of the trace element Boron is used to overcome Boron deficiencies in common fruits and vegetables, particularly in sandy and acidic soil con...
Boron Trace Element Fertiliser 500g | Manutec Soluble
$15.00
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Magnesium Sulphate Fine (Epsom Salts) Typical Analysis: MgSO4 7H2O  99.5% min. Magnesium (Mg) as sulphate 9.8% min Sulphur (S) as sulphate 13% Disclaimer: ...
Magnesium Sulphate Fine (Epsom Salts)
$2.90
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Muriate of Potash Soluble (Potassium Chloride) (Redox) (WSM) NPK = 0-0-60 Potassium Chloride (KCI) = 97% Potassium Oxide (K2O) = 60%-61.3% Potassium chloride...
Muriate of Potash Soluble (Potassium Chloride) (WSM)
$10.00
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Iron Sulphate is a high-quality soluble source of iron and sulphur suitable for foliar or fertigation applications for use on greens, tees, and other closely...
Iron Sulphate (Ferrous Sulphate Heptahydrate)
$4.80
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What is water soluble fertiliser?

Water soluble fertiliser is designed to dissolve in water before being applied to plants. This allows nutrients to be delivered through watering cans, irrigation systems, fertigation equipment or, where the individual product permits, as a foliar application.

Water soluble fertilisers are widely used by home gardeners, nurseries, horticultural growers and hydroponic growers because nutrient concentrations can be adjusted to suit different plants and stages of growth.

Complete NPK fertilisers and individual nutrients

Our range includes both complete water soluble NPK fertilisers and individual soluble nutrients.

Complete formulas such as Campbells and Peters Professional fertilisers provide nitrogen, phosphorus and potassium together with other nutrients and trace elements, depending on the formulation.

Individual nutrients such as calcium nitrate, potassium nitrate and mono potassium phosphate (MKP) allow growers to supply particular nutrients or develop more specialised feeding programs.

Water soluble NPK fertiliser

Complete soluble NPK fertilisers are convenient when plants require a combination of major nutrients. Different formulations are available for general plant growth, flowering, fruiting, orchids and professional horticultural applications.

For a broader selection of granular and soluble NPK products, see our NPK Fertiliser collection.

Water soluble fertiliser for fertigation and hydroponics

Many fully soluble fertilisers can also be suitable for fertigation, irrigation and hydroponic growing systems. Solubility is particularly important in these systems because undissolved material can cause problems with irrigation equipment.

Product suitability, concentration and compatibility can vary considerably, so always follow the manufacturer's directions for the individual fertiliser.

Choosing a water soluble fertiliser

The best fertiliser depends on the crop, growing medium, water quality and nutrients required. General-purpose complete fertilisers are often the easiest choice for home gardeners, while individual nutrient products give professional and experienced growers greater control over their fertiliser program.

Browse the products above to compare our range of water soluble fertilisers, from small packs for home gardeners through to economical commercial and bulk sizes.