Watermelon Crop Nutrition | Fertilizers, Micronutrients & Biostimulants for Watermelon Crop

Provide your watermelon crop with complete nutrition from sowing to harvesting. Browse fertilizers, micronutrients, and biostimulants recommended for root development, vine growth, flowering, fruit setting, fruit development, fruit sizing, sweetness improvement, and yield enhancement to support healthy plants, improved fruit retention, bigger fruits, enhanced sweetness, improved rind quality, and maximum yield.

This collection helps watermelon growers easily select products based on crop growth stage, crop requirement, or nutrient deficiency symptoms.

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Crop Duration

Average Crop Duration: 75-110 Days

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Products Available in This Collection

Water Soluble Fertilizers

• 12-61-00 (MAP)

• 19-19-19

• 13-40-13

• 00-52-34 (MKP)

• Calcium Nitrate

• Potassium Nitrate (13-00-45)

• 00-00-50 (SOP)

Micronutrients

• Zinc EDTA 12%

• Iron EDTA 12%

• Boron 20%

• Calcium EDTA 12%

• Magnesium EDTA

• Manganese EDTA

• Copper EDTA

• Chelated Micronutrient Mix

Specialty Nutrition Products

• Calcium Boron

• Calcium + Boron + Magnesium EDTA

• Magnesium Sulphate (MgSO₄)

Biostimulants

• Amino Acid 80%

• Seaweed Extract

• Humic Acid

• Fulvic Acid 80%

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Watermelon Crop Nutrition Schedule

Crop Stage	Crop Days After Sowing	Recommended Products
🌱 Germination & Root Development	0-15 Days	12-61-00, Humic Acid, Fulvic Acid 80%, Seaweed Extract
🌿 Vine Growth & Branching	15-30 Days	19-19-19, Zinc EDTA 12%, Amino Acid, Fulvic Acid 80%
🌼 Flower Initiation	30-45 Days	13-40-13, Boron 20%, Calcium Boron, Seaweed Extract
🍉 Fruit Set & Retention	40-55 Days	00-52-34, Calcium Boron, Calcium + Boron + Magnesium EDTA
📈 Fruit Development & Fruit Sizing	50-80 Days	Potassium Nitrate, Calcium EDTA 12%, Magnesium EDTA
❤️ Sweetness & Quality Development	70-95 Days	00-00-50, Potassium Nitrate, Fulvic Acid 80%
🚜 Yield Enhancement & Harvest Quality	80-110 Days	SOP, Potassium Nitrate, Micronutrient Mix, Amino Acid

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Stage-Wise Nutrition Guide

🌱 Germination & Root Development (0-15 Days)

Objective

• Faster germination

• Strong root growth

• Better seedling establishment

Recommended Products

• 12-61-00

• Humic Acid

• Fulvic Acid 80%

• Seaweed Extract

Dosage

Foliar Spray

• 12-61-00: 5 g/L

• Humic Acid: 1-2 g/L

• Fulvic Acid 80%: 0.5-1 g/L

• Seaweed Extract: 1-2 g/L

Drip Fertigation

• 12-61-00: 1-2 kg/acre

• Humic Acid: 500 g/acre

• Fulvic Acid 80%: 250-500 g/acre

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🌿 Vine Growth & Branching (15-30 Days)

Objective

• Vigorous vine growth

• More branching

• Better canopy development

Recommended Products

• 19-19-19

• Zinc EDTA 12%

• Amino Acid 80%

• Fulvic Acid 80%

Dosage

Foliar Spray

• 19-19-19: 5 g/L

• Zinc EDTA: 0.5-1 g/L

• Amino Acid: 1-2 g/L

Drip Fertigation

• 19-19-19: 2-3 kg/acre

• Zinc EDTA: 250-500 g/acre

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🌼 Flower Initiation (30-45 Days)

Objective

• More flowering

• Better flower retention

• Reduced flower drop

Recommended Products

• 13-40-13

• Boron 20%

• Calcium Boron

• Seaweed Extract

Dosage

Foliar Spray

• 13-40-13: 5 g/L

• Boron 20%: 1 g/L

• Calcium Boron: 1-2 g/L

Drip Fertigation

• 13-40-13: 2-3 kg/acre

• Boron Products: 250-500 g/acre

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🍉 Fruit Set & Retention (40-55 Days)

Objective

• Better fruit setting

• Reduced fruit drop

• Uniform fruit development

Recommended Products

• 00-52-34

• Calcium Boron

• Calcium + Boron + Magnesium EDTA

• Amino Acid

Dosage

Foliar Spray

• MKP: 5 g/L

• Calcium Boron: 1-2 g/L

Drip Fertigation

• MKP: 2-3 kg/acre

• Specialty Products: 500 g-1 kg/acre

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📈 Fruit Development & Fruit Sizing (50-80 Days)

Objective

• Bigger fruits

• Increased fruit weight

• Better rind strength

Recommended Products

• Potassium Nitrate

• Calcium EDTA 12%

• Magnesium EDTA

• Fulvic Acid 80%

Dosage

Foliar Spray

• Potassium Nitrate: 5 g/L

• Calcium EDTA: 1-2 g/L

• Magnesium EDTA: 1 g/L

Drip Fertigation

• Potassium Nitrate: 3-5 kg/acre

• Calcium EDTA: 500 g-1 kg/acre

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❤️ Sweetness & Quality Development (70-95 Days)

Objective

• Higher sweetness (Brix)

• Better fruit colour

• Improved eating quality

Recommended Products

• 00-00-50

• Potassium Nitrate

• Fulvic Acid 80%

Dosage

Foliar Spray

• SOP: 5 g/L

• Fulvic Acid 80%: 0.5-1 g/L

Drip Fertigation

• SOP: 3-5 kg/acre

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🚜 Yield Enhancement & Harvest Quality (80-110 Days)

Objective

• Better market quality

• Higher yield

• Improved shelf life

Recommended Products

• SOP

• Potassium Nitrate

• Micronutrient Mix

• Amino Acid

Dosage

Foliar Spray

• SOP: 5 g/L

• Micronutrient Mix: 1-2 g/L

Drip Fertigation

• SOP: 3-5 kg/acre

• Micronutrient Mix: 500 g-1 kg/acre

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Nutrient Deficiency Solutions

Deficiency	Symptoms	Recommended Product
Zinc Deficiency	Small leaves, poor vine growth	Zinc EDTA 12%
Iron Deficiency	Yellow young leaves	Iron EDTA 12%
Boron Deficiency	Poor fruit set, hollow fruits	Boron 20%, Calcium Boron
Calcium Deficiency	Fruit cracking, blossom-end issues	Calcium EDTA 12%, Calcium Boron
Magnesium Deficiency	Yellow older leaves	Magnesium EDTA, MgSO₄
Multiple Deficiencies	Weak plants, low yield	Chelated Micronutrient Mix

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Problem-Based Solutions

Crop Problem	Recommended Products
Poor Germination	12-61-00 + Humic Acid + Fulvic Acid 80%
Weak Vine Growth	19-19-19 + Amino Acid + Seaweed Extract
Poor Flowering	13-40-13 + Boron 20%
Flower Drop	Boron 20% + Calcium Boron
Poor Fruit Set	MKP + Calcium Boron
Fruit Drop	Calcium Boron + Calcium EDTA 12%
Small Fruits	Potassium Nitrate + SOP
Fruit Cracking	Calcium EDTA 12% + Calcium Boron
Low Sweetness (Low Brix)	SOP + Potassium Nitrate
Poor Fruit Colour	SOP + Fulvic Acid 80%
Soft Fruits	Calcium EDTA 12%
Low Yield	SOP + Potassium Nitrate + Micronutrient Mix
Yellow Leaves	Iron EDTA or Magnesium EDTA

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Quick Dosage Guide

For 15 Litre Knapsack Sprayer

Product	Quantity
Water Soluble Fertilizers	75 g
Micronutrients	8-15 g
Calcium Products	15-30 g
Fulvic Acid 80%	8-15 g
Amino Acid 80%	15-30 g
Seaweed Extract	15-30 g
Humic Acid	15-30 g

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Benefits

✓ Strong Root Development

✓ Vigorous Vine Growth

✓ Improved Flowering

✓ Better Fruit Set

✓ Reduced Fruit Drop

✓ Increased Fruit Size and Weight

✓ Higher Sweetness (Brix)

✓ Better Fruit Colour

✓ Improved Fruit Firmness

✓ Reduced Fruit Cracking

✓ Better Shelf Life

✓ Higher Marketable Yield

✓ Suitable for Foliar Spray and Drip Fertigation

Suitable For

Hybrid Watermelon • Seedless Watermelon • Crimson Sweet • Sugar Baby • Kiran Watermelon • Open Field Watermelon • Drip Irrigated Watermelon Cultivation