Sulphur Dust Powder 4kg – Natural Sulphur Fungicide, Miticide and Soil Acidifier for Plants

Natural Sulphur Dust for Mildew, Mites and Soil pH

Sulphur Dust Powder is a fine, natural elemental sulphur used in gardening and agriculture as a contact fungicide, miticide and soil acidifier. It controls fungal diseases such as powdery mildew, rust and black spot, helps control mites, and can be worked into soil to lower pH for acid-loving plants. This 4kg pack is packed by Bonnyrigg Produce & Garden Supplies and suits larger gardens, orchards and growers treating many plants through the season.

What's Sulphur Used For in the Garden?

Powdered sulphur has three main garden uses:

• Fungal disease control: prevents and manages powdery mildew, rust and black spot on grapes, roses, cucurbits and ornamentals
• Mite control: acts against citrus rust mite and other garden mites
• Soil acidification: lowers soil pH for acid-loving plants and corrects sulphur deficiency

As a naturally occurring mineral, powder sulphur is a traditional, non-synthetic choice for gardeners who prefer simple, mineral-based treatments.

A Contact Sulphur Fungicide That Works Best Early

Sulphur works on contact rather than systemically. As a sulphur fungicide, it forms a protective layer on leaves and stems that stops fungal spores from establishing, so it works best applied early as a preventative, before disease takes hold. Because it sits on the surface, it washes off with rain and heavy watering, so reapply after wet weather.

Using Sulphur Powder to Lower Soil pH

Acid-loving plants such as azaleas, camellias, rhododendrons, gardenias and blueberries struggle in alkaline soil, often showing yellow leaves. Sulphur powder for plants can be worked into the top 10cm of soil to lower pH, at roughly 25 to 120 grams per square metre depending on soil type, then watered in thoroughly. Sandy soils need less and clay soils need more. Elemental sulphur works slowly, as soil bacteria convert it over several weeks to months, so test your soil pH before and after rather than adding more too soon. It also supplies sulphur where soils are deficient, which is why gardeners sometimes use sulfur for fertilizer purposes.

How to Use Sulphur Dust on Plants

• Lightly and evenly dust the powder over both upper and lower leaf surfaces, ideally with a dusting applicator
• Apply early as a preventative and reapply after rain or heavy watering
• Do not apply when temperatures are above 30°C, or above 24°C on sensitive plants, as heat can cause leaf burn
• Some plants and varieties are sulphur-sensitive, so test on a small area first
• Do not use on moisture-stressed plants
• Do not apply within a few weeks of an oil-based spray such as white oil, as sulphur and oil together can scorch foliage

Safety and Handling

Sulphur is a low-toxicity natural product, but as a fine dust it should be handled with care. Wear a dust mask and eye protection when applying to avoid irritation, and apply on a still day. Fine sulphur powder is combustible, so keep it away from open flames and sparks. Store it sealed in a cool, dry place out of reach of children and pets, and wash your hands after use.

Key Features and Benefits

• Fine, natural elemental sulphur dusting powder
• Contact fungicide for powdery mildew, rust and black spot
• Miticide for citrus rust mite and other garden mites
• Soil acidifier for azaleas, camellias and other acid-loving plants
• Corrects sulphur deficiency in soil
• Larger 4kg pack for big gardens, orchards and growers

Product Details

• Product: Sulphur Dust Powder
• Packed by: Bonnyrigg Produce & Garden Supplies
• Type: Fine elemental sulphur powder
• Pack size: 4kg
• Uses: Fungicide, miticide and soil acidifier

Frequently Asked Questions

What is Sulphur Dust Powder 4kg used for?

Sulphur Dust Powder 4kg is used to control fungal diseases like powdery mildew, rust and black spot, to control garden mites, and to lower soil pH for acid-loving plants. The larger pack suits bigger gardens and orchards.

How do I use Sulphur Dust Powder as a soil acidifier?

Work it into the top 10cm of soil at roughly 25 to 120 grams per square metre, depending on soil type, then water in well. Test soil pH first, and allow several weeks to months for it to take effect before adding more.

Is sulfur dust toxic to humans?

Sulphur has low toxicity, but the fine dust can irritate the eyes, skin and lungs. Wear a dust mask and eye protection when applying, avoid breathing the dust and wash your hands after use.

Does sulphur kill mites?

Yes. Sulphur acts as a miticide against citrus rust mite and other garden mites. Cover both sides of the leaves, as mites often feed on the undersides.

When should I avoid using sulphur dust?

Avoid applying above 30°C, or above 24°C on sensitive plants, on moisture-stressed plants, or within a few weeks of an oil spray like white oil, as these can lead to leaf burn.

Does it work on insects?

Its main uses are fungal disease and mite control. It is not a general insecticide, so choose a product designed for the insect pest you have.

Where can I buy sulphur dust powder in Australia?

Sulphur Dust Powder 4kg is available from Bonnyrigg Produce & Garden Supplies at 462 Elizabeth Dr, Bonnyrigg NSW 2177, Australia. You can visit our store or order online with delivery across Australia.