Crop guidance

Watermelon

13 Humuson products list watermelon in their published guidance — explore them by growth stage below.

Season timeline

Stages are matched from each product’s own published guidance — a product appears at a stage only when its documentation references it.

Seed coating

Bio NPK Powder Sseed treatment

Products listed for watermelon

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Microbiological FertilisersFeatured

cereals, oilseeds, potatoes, maize, legumes +14 more

Seed treatment · Soil drench

Nando

Bio NPK Powder S

Microbial powder for seed dressing and soil application, formulated with beneficial bacteria and fungi that provide plants with nitrogen, phosphorus, potassium and silicon through natural microbial processes.

50g · pack size not stated ("Covers 4 hectares")from$30

BiostimulantsFeatured

cereals, legumes, maize, potatoes, brassicas +15 more

Foliar · Soil drench

IKAR

Ocean

Liquid fertilizer with a high concentration of seaweed extract and amino acids, designed for foliar application or watering.

1 L · 5 Lfrom$22

Crop NutritionFeatured

cereals, oilseeds, legumes, maize, potatoes +15 more

IKAR

iN5 NPK 3-30-0

Liquid phosphorus and zinc fertilizer designed to enhance root development, flowering and nutrient uptake.

1 L · 5 Lfrom$16

Crop NutritionFeatured

fruit crops, brassicas, cauliflower, broccoli, cabbage +18 more

IKAR

Koral

Liquid calcium fertilizer enriched with amino acids, designed to strengthen plant tissues and cell walls and improve overall plant health.

1 L · 5 Lfrom$16

Crop NutritionFeatured

cereals, legumes, maize, potatoes, brassicas +14 more

IKAR

Silicare

Liquid fertilizer containing potassium, phosphorus and silicon, designed to enhance plant resilience and nutrient efficiency.

1 L · 5 Lfrom$20

BiostimulantsFeatured

cereals, fruit crops, brassicas, cauliflower, broccoli +9 more

Foliar · Soil drench

Arvensis Agro

A3 Biostimulant

High-performance organo-mineral biostimulant designed to enhance stress tolerance, improve nutrient absorption and stimulate robust root and shoot growth.

250 g · 1 kgfrom$10

BiostimulantsFeatured

fruit crops, cereals, maize, brassicas, cauliflower +10 more

Foliar · Soil drench

CMD Industries

eMAXX Ultra

Cold-processed, full-spectrum Ecklonia maxima (kelp) formulation enhanced with selected bioactives — for stronger plant growth, abiotic stress resilience and consistent crop performance.

1 L$17

Crop Nutrition

cereals, oilseeds, brassicas, cauliflower, broccoli +10 more

IKAR

Enzo Pro

Liquid fertilizer enriched with manganese, zinc, copper and the amino acid L-Proline, designed to enhance plant growth and development.

1 L · 5 Lfrom$21