SoluPotasse 25kg Sulphate of Potash (SOP) Water-Soluble Potassium Fertiliser

SoluPotasse 25kg Sulphate of Potash (SOP): Water-Soluble Potassium and Sulphur Fertiliser

SoluPotasse is a premium water-soluble sulphate of potash (SOP) fertiliser from Tessenderlo (Belgium), supplying a high concentration of potassium and sulphur in a fully soluble, low-chloride form. It's a fine white powder that dissolves rapidly and completely, leaving virtually no residue, which makes it ideal for fertigation and foliar feeding as well as soil application.

This product is available in a range of pack sizes to suit different needs, from smaller 1kg, 2kg and 4kg packs for home gardeners and smaller jobs, through to the large 25kg bag for growers and anyone treating bigger areas. Whichever size you choose, it's the same premium water-soluble SOP.

Potassium is essential for fruit development, sugar and starch formation, water regulation and overall plant quality, while sulphur (in the readily available sulphate form) supports protein synthesis and healthy growth. SoluPotasse delivers both nutrients in one product, and because it's virtually free of chloride and nitrates, it's especially well suited to chloride-sensitive crops such as fruit, vegetables, potatoes, grapes and tomatoes, where it helps produce high-quality, well-coloured, firm produce. Unlike muriate of potash (potassium chloride), SOP has a very low salt index, so it's a gentler potassium source for sensitive crops and quality-focused growing.

Typical Analysis

• Potassium (as K2O): around 50%

• Sulphur (as SO3): around 45%

• Virtually chloride-free (typically ~0.6% Cl) and free of nitrates

• Fully water-soluble fine white powder

Key Features & Benefits

• Premium water-soluble sulphate of potash (SOP)

• High potassium plus plant-available sulphate sulphur in one product

• Dissolves rapidly and completely, leaving virtually no residue

• Virtually chloride-free and nitrate-free, ideal for chloride-sensitive crops

• Very low salt index, gentle on sensitive crops

• Improves fruit and vegetable quality (size, colour and firmness)

• Helps boost crops' tolerance to stress

• Available in 1kg, 2kg, 4kg and 25kg

• Suitable for fertigation, foliar spraying and soil application

How to Use

• Soil application: broadcast or band into the soil before planting, or apply as a side dressing, then water in

• Fertigation: dissolve fully in water and apply through drip, micro-sprinkler, sprinkler or pivot systems

• Foliar spraying: apply as a dilute foliar spray to address potassium needs quickly

• Always follow the specific rates and directions on the product label for your crop

• When mixing solutions, dissolve SoluPotasse first before adding other fertilisers

Getting the Best From It

• Do not mix it with calcium-containing fertilisers, as this causes calcium sulphate to precipitate; keep calcium products in a separate tank or application

• Because the solution is acidic, it can improve the availability of phosphorus, iron and other micronutrients and helps keep drip lines clear

• A soil or leaf test helps you match potassium applications to what the crop actually needs

• Use filters in irrigation systems, as recommended for any solid fertiliser used in fertigation

• Store in a cool, dry place with the bag sealed, as it will readily take up moisture

FAQs

What is SoluPotasse used for?
It's a water-soluble sulphate of potash fertiliser used to supply potassium and sulphur to a wide range of crops, through soil application, fertigation or foliar spraying. It's especially suited to fruit, vegetables and other chloride-sensitive crops.

What is the analysis?
It supplies around 50% potassium (as K2O) and around 45% sulphur (as SO3), and is virtually free of chloride and nitrates.

What sizes does it come in?
It's available in 1kg, 2kg, 4kg and 25kg, so you can choose a small pack for home use or the large 25kg bag for bigger areas.

Why choose SOP over muriate of potash (MOP)?
SOP is virtually chloride-free with a very low salt index, so it's gentler on chloride-sensitive and quality-focused crops than potassium chloride, and it also supplies sulphur.

Can I mix it with other fertilisers?
It's compatible with most soluble fertilisers, but not with calcium-containing products, which cause a precipitate. Dissolve SoluPotasse first before adding others.

Where can I buy SoluPotasse in Australia?
Order online for delivery across Australia, or pick up in-store at Bonnyrigg, NSW. Delivery options for the larger 25kg bag are shown at checkout.