AS4419 Certified Soil
AS 4419 Soil refers to landscape soil blends developed in accordance with the Australian Standard AS 4419:2018. This standard sets out key requirements for texture, structure, pH, drainage, nutrient availability and contaminant levels, ensuring soils are suitable for healthy plant growth in commercial landscaping, streetscapes, gardens and urban infrastructure.
If you're delivering a civil, council or commercial project that requires adherence to Australian soil standards, Daisy’s AS4419 compliant soils are tested and ready to meet the specifications and high standards demanded by commercial clients.
AS4419 Certified Soil Technical Guidelines
| Parameter | Target Range / Requirement |
| pH (1:5 water extract) | 5.3 – 8.0 |
| Electrical Conductivity (EC) | ≤ 1.5 dS/m (sensitive species); ≤ 2.0 dS/m (general) |
| Wettability | < 8 minutes (Time to Wet test) |
| Organic Matter (OM by dry weight) | 1 – 25% depending on blend and application |
| Particle Size Distribution (PSD) | Must fit specified grading envelope per soil type |
| Phosphorus (Olsen P) | 5 – 15 mg/kg (unless otherwise specified) |
| Permeability | Sufficient to prevent waterlogging and support aeration |
| Nitrogen Drawdown Index (NDI) | ≥ 150 (NDI150) for organic-amended soils |
| Bulk Density (dry) | 600 – 1400 kg/m³ depending on application |
| Toxicity / Contaminants | Free from phytotoxic substances, plastics, weeds |
Daisy’s AS 4419-compliant soil blends are developed to meet the performance benchmarks set out in the Australian Standard AS 4419:2018 — Soils for Landscaping and Garden Use. This includes specification of parameters such as pH, electrical conductivity, permeability, nutrient levels, organic matter content, and physical texture. These criteria are essential for supporting healthy plant growth, preventing compaction, managing drainage and ensuring compliance on commercial, civil and council-managed projects.
All test data is verified by a Certified Professional Soil Scientist and can be supplied on request in the form below.
AS4419 Certified Soil at Daisy's Garden Supplies
In-House Production
Our Hallam and Pt Henry facilities allows full control over blending and quality, ensuring consistency and rapid supply.
Certified Testing
All soils are batch-tested at accredited labs and reviewed by Certified Professional Soil Scientists (CPSS) for compliance with required specifications.
Proven Experience
We have supplied large-scale projects across the state, with an understanding of design requirements and the importance of achieving the correct standards.
Technical Support
Our team works closely with project managers and consultants to meet both regulatory and performance needs.
Testing Certified by
