Welcome to your comprehensive guide on DAP Blend (18-20-0-2): the revolutionary fertiliser that’s transforming how farmers and gardeners approach crop nutrition. Unlike traditional DAP, our sulfur-enhanced formula delivers essential phosphorus AND sulfur in one powerful application, giving your crops the complete foundation they need for explosive root development, robust flowering, and maximum yields.
In this guide, we’ll explore the benefits of sulfur-enhanced DAP, when to use it for best results, and how to apply it effectively across different crops and growing systems.
What is DAP Blend?
DAP (Diammonium Phosphate) has long been valued for its high phosphorus content, and our 18-20-0-2 formula includes added sulfur to provide complete early-season nutrition for your crops.
The 18-20-0-2 Breakdown:
18% Nitrogen (N): Powers early vegetative growth and protein synthesis
20% Phosphorus (P₂O₅): Drives root development, flowering, and fruit set
0% Potash (K₂O): Allows targeted nutrition without potassium interference
2% Sulfur (S): Enhances protein formation and nutrient uptake efficiency
Application Guidelines for Maximum Results
⚠️ Important: Application rates vary based on soil type, crop requirements, and existing nutrient levels. Getting advice from experts, and soil testing is recommended for optimal results.
🏡 Small Gardens & Raised Beds
Rate: 40-50g per m² (approximately 2 tablespoons per square meter)
Method: Work into top 10cm of soil before planting or side-dress established plants
Timing: Apply at planting or early growth stage
Tip: Water in thoroughly to activate nutrient release
🥕 Vegetable Gardens
Rate: 30-40g per m² for most vegetables
Application: Broadcast evenly and incorporate into soil
Frequency: One application at planting, optional side-dress at flowering
Special Note: Particularly beneficial for brassicas, root crops, and fruiting vegetables
🚜 Broadacre Crops
Cereals: 50-80 kg per hectare at seeding
Canola/Oil Seeds: 60-100 kg per hectare
Corn: 80-120 kg per hectare
Method: Band placement near seed for best efficiency
Timing: At seeding or within 2 weeks of emergence
🌱 Pasture & Forage
New Pasture: 80-120 kg per hectare at seeding
Established Pasture: 60-80 kg per hectare as topdressing
Legume Establishment: Use higher rates (100-150 kg/ha) to promote clover and lucerne establishment
🌳 Fruit Trees
Young Trees: 100-150g per tree in early spring
Mature Trees: 200-400g per tree depending on size
Method: Spread evenly under canopy, avoid trunk contact
Timing: Early spring before bud break for best results
💧 Fertigation Systems
Rate: 2-3g per litre of water for concentrated feeding
Frequency: Weekly applications during active growth
Tip: Ensure complete dissolution before application
Key Benefits for Your Crops
🌱 Superior Root Development
The high phosphorus content stimulates explosive root growth from day one, creating stronger, more resilient plants that can access water and nutrients more effectively.
⚡ Enhanced Nutrient Uptake
Sulfur acts as a catalyst, improving your plants’ ability to absorb and utilise nitrogen and phosphorus – meaning better returns on your fertiliser investment.
🌸 Explosive Flowering & Fruit Set
The phosphorus-sulfur combination promotes abundant flowering, improved pollination, and significantly better fruit set across all crop types.
🛡️ Improved Stress Tolerance
Sulfur strengthens plant cell walls and boosts natural defence mechanisms, helping crops withstand drought, disease, and environmental stress.
🌾 Complete Early-Season Nutrition
Provides everything plants need during their critical establishment phase without the guesswork of multiple applications.
💰 Cost-Effective Performance
One application delivers multiple nutrients, reducing labour costs and eliminating the need for separate sulfur supplements.
When to Use DAP
🌾 Field Crops & Cereals
Perfect for wheat, barley, corn, and canola during seeding or early growth stages. The phosphorus drives root establishment while sulfur improves grain protein content.
🥦 Vegetable Production
Essential for root vegetables, brassicas, and fruiting crops like tomatoes and peppers. Promotes strong transplant establishment and early vigour.
🌱 Pasture Establishment
Ideal for new pasture seeding or renovation projects. Creates dense, productive grazing systems with improved legume establishment.
🍎 Fruit Trees & Orchards
Excellent for young tree establishment and mature orchards needing phosphorus boost. Enhances fruit quality and tree longevity.
🌷 Flower & Ornamental Gardens
Promotes abundant blooming and vibrant colours in flowering plants, roses, and ornamental shrubs.
⚠️ Identifying Nutrient Deficiencies
Use when plants show stunted growth, purple leaf tinting, poor flowering, or delayed maturity – classic signs of phosphorus or sulfur deficiency.
Perfect for Australian Growing Conditions
Sulfur deficiency is a growing problem for Australian farmers, particularly affecting crop yields and soil health across the continent. Australia’s increased area planted to canola, which has a high sulfur requirement, has made sulfur deficiency more evident in many agricultural soils.
Our sulfur-enhanced DAP (18-20-0-2) is specifically formulated to address this challenge by providing both phosphorus and sulfur in one application – making it an ideal choice for Australian growers dealing with sulfur-depleted soils.
Why Choose This Formula
✅ Proven Performance Benefits
• 25-40% better root development for stronger plants
• Improved crop establishment and early vigour
• Enhanced stress tolerance and disease resistance
• Better nutrient use efficiency = higher yields per application
✅ Complete Nutrition Solution
• Provides both phosphorus and sulfur in one application
• Eliminates need for separate sulfur supplements
• Reduces application timing complexity
• Lower labour and machinery costs
• Perfect foundation for balanced fertility programs
✅ Versatile & Reliable
• Works across all soil types and pH levels
• Compatible with most other fertilisers and amendments
• Suitable for conventional and sustainable farming systems
• Trusted by commercial growers and home gardeners alike
Frequently Asked Questions
1. Can I apply sulfur-enhanced DAP with other fertilisers?
Yes, it’s compatible with most fertilisers. Avoid direct mixing with lime or high-pH materials which may reduce nutrient availability.
2. How quickly will I see results?
Root development improvements are visible within 1-2 weeks, with above-ground growth response typically seen within 2-3 weeks under favourable conditions.
3. Is it suitable for organic growing systems?
Check with your organic certifier, as regulations vary by region and certification body.
4. Can it be used on acid-sensitive crops?
Yes, the moderate pH impact makes it suitable for most crops, but always consider your soil’s existing pH levels.
5. What’s the shelf life?
When stored in a cool, dry place, sulfur-enhanced DAP maintains its effectiveness for several years.
6. Available package sizes?
Currently available in 500 g retail packs and 5kg options. Contact us for commercial quantity pricing.
Get the Best Results for Your Crops
Experience the benefits of Sulfur-Enhanced DAP (18-20-0-2) and provide your crops with the complete nutrition they need for optimal development. With superior root growth, enhanced flowering, and improved stress tolerance, your crops will reach their full potential.
Order your Sulfur-Enhanced DAP today – Australia-wide FREE shipping included!
