Manutec Aluminium Sulphate - Soil & Water Acidifier
Manutec Aluminium Sulphate is a fast-acting acidifying agent used by gardeners across Toowoomba and the Darling Downs to lower soil pH, enhance nutrient availability, and encourage blue flowers on hydrangeas. It is also widely used to help clarify garden ponds and water features by binding fine particles so they settle out of the water.
Ideal for alkaline soils common in the Toowoomba region, aluminium sulphate works quickly compared to other soil acidifiers, making it a reliable solution when rapid pH adjustment is required.
Whether you’re correcting soil conditions for acid-loving plants or maintaining clear water in ornamental ponds, Manutec Aluminium Sulphate delivers dependable, professional results for home gardeners and horticulturalists alike.
Why Choose Manutec Aluminium Sulphate?
Rapidly lowers soil pH in alkaline conditions
Encourages blue colouring in hydrangea flowers
Improves nutrient uptake in acid-loving plants
Helps clarify ponds and water features
Trusted Australian brand with consistent results
Ideal for Toowoomba & Darling Downs soils
Ideal For
Hydrangeas (blue flower development)
Azaleas, camellias & gardenias
Blueberries and other acid-loving plants
Correcting alkaline garden soils
Clearing cloudy garden ponds & water features
How to Use
For Soil Acidification:
Apply at the recommended rate and water in well. Always test soil pH before and after application to avoid over-acidifying.
For Hydrangeas:
Apply during the growing season to maintain acidic soil conditions that support blue flower colour.
For Ponds & Water Features:
Use carefully and follow label directions to ensure safe application for aquatic environments.
⚠️ Always follow label instructions. Avoid over-application and wear gloves when handling.
Local Gardening Tip - Toowoomba
Many soils in the Toowoomba region tend toward alkaline clay or loam, which can limit nutrient availability for acid-loving plants. Using a fast-acting product like Manutec Aluminium Sulphate allows gardeners to correct soil pH efficiently, especially before planting or during the growing season.
For personalised advice, visit the friendly team at True Blue Garden Centre, Toowoomba.
Available at True Blue Garden Centre, Toowoomba
Support a local, independent garden centre and get expert advice tailored to Darling Downs conditions. Manutec Aluminium Sulphate is available in-store and online for convenient local pickup or delivery.

