Sulphur Dust Powder 2kg: Garden Sulphur for Powdery Mildew, Mites and Soil pH

Sulphur Dust Powder: A Natural Garden Sulphur for Plants and Soil

This sulphur dust is a fine, natural elemental sulphur powder used in gardening and horticulture as a contact fungicide, a miticide and a soil acidifier. Dusted onto leaves, it helps protect plants from powdery mildew, rust, black spot and mites. Worked into soil, it gradually lowers soil pH for acid-loving plants. This 2kg bag is packed by Bonnyrigg Produce & Garden Supplies for home gardens, vegetable patches and small orchards.

What Is Sulphur Powder Used For?

• Powdery mildew: on grapes, roses, cucurbits such as zucchini and pumpkin, and ornamentals
• Rust and black spot: on roses and other susceptible plants
• Mites: including citrus rust mite and other garden mites
• Lowering soil pH: for azaleas, camellias, rhododendrons, blueberries and other acid-loving plants, or for alkaline soils and lawns

How Sulphur Works as a Fungicide

Sulphur works on contact rather than moving through the plant. A fine layer on the leaf surface stops fungal spores germinating and getting established, so it works best as a preventative, applied before disease takes hold or at the very first signs. Because it's a contact treatment, rain and overhead watering wash it off, so it needs reapplying through the season.

Does Sulphur Kill Mites?

Yes. Sulphur is a contact miticide that controls a range of garden mites, including citrus rust mite. Coverage matters, as mites live mostly on the undersides of leaves, so dust both leaf surfaces evenly.

How to Use Sulphur Dust on Plants

• Use a garden duster or puffer for a fine, even coat.
• Dust lightly over both the upper and lower leaf surfaces.
• Apply early in the season as a preventative, then reapply after rain or heavy watering.
• Apply in the cool of the morning or evening on a still day.
• Don't apply when temperatures are above about 30°C, or above about 24°C on sensitive plants, as heat can cause leaf burn.
• Don't apply to plants that are dry or moisture stressed.
• Test a small area first on melons and other cucurbits, as some varieties are sensitive to sulphur.

Garden Sulphur for Lowering Soil pH

To make soil more acidic, work sulphur powder into the top 10cm of soil and water it in. As a general guide, gardeners use around 25 to 120g per square metre, using the lower end on sandy soils and the higher end on heavier clay soils. Soil bacteria slowly convert the sulphur into acid, so the pH drops over several weeks to months rather than straight away. Test your soil pH before and after, and apply in smaller doses rather than one large one. The same method is used as sulfur for lawn areas on alkaline soils.

Don't Mix with Oil Sprays

Avoid applying sulphur 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 mineral, but the fine dust needs sensible handling. Wear a dust mask and eye protection while dusting, especially on still days, and wash your hands afterwards. Fine sulphur dust is combustible, so keep it away from open flames, sparks and heat. Store it sealed in a cool, dry place, out of reach of children and pets.

Key Features and Benefits

• Fine elemental sulphur dusting powder
• Contact fungicide for powdery mildew, rust and black spot
• Controls mites, including citrus rust mite
• Lowers soil pH for acid-loving plants
• Natural, non-synthetic mineral
• Best used as a preventative and reapplied after rain
• 2kg bag packed in Bonnyrigg, NSW

Product Details

• Product: Sulphur Dust Powder
• Type: Elemental sulphur, fine dusting powder
• Uses: Foliage dusting, soil acidification
• Pack size: 2kg
• Packed by: Bonnyrigg Produce & Garden Supplies

Frequently Asked Questions

What is sulphur dust powder used for?

It's used as a contact fungicide for powdery mildew, rust and black spot, as a miticide for garden mites, and as a soil acidifier to lower pH for acid-loving plants.

How do you use sulphur dust powder on plants?

Dust it lightly and evenly over both sides of the leaves with a duster, in the cool of the day. Apply early as a preventative and reapply after rain or heavy watering.

Does sulfur kill mites?

Yes. Sulphur controls many garden mites on contact, including citrus rust mite. Cover the undersides of leaves, where most mites live.

Is sulphur good for garden plants?

Yes, used correctly. It's a natural way to protect plants from fungal disease and mites, and it can lower soil pH for acid-loving plants. Avoid hot weather, stressed plants and oil sprays to prevent leaf burn.

Can I use sulphur powder to lower soil pH?

Yes. Work it into the top 10cm of soil and water in, using roughly 25 to 120g per square metre depending on soil type. The pH drops gradually over weeks to months, so test before reapplying.

When should I avoid using sulphur?

Avoid temperatures above about 30°C (or 24°C on sensitive plants), moisture-stressed plants, and the weeks before or after an oil spray such as white oil.

Does sulphur kill insects?

No. Its main uses are fungal disease and mite control. For insects such as aphids or caterpillars, use a product made for those pests.

Where can I buy sulphur dust powder in Australia?

Sulphur Dust Powder 2kg 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.