NPK 13:00:45 Fertilizer Uses

NPK 13:00:45 is a fully water-soluble, nitrogen-and-potassium-rich fertilizer grade available in both water-soluble powder and liquid suspension formulations. Unlike the crop-protection technicals on this site, it is a plant nutrition product — a foliar-applied source of 13% nitrogen and 45% potash (K₂O) with no phosphorus — used across cereals, field crops, vegetables, pulses, oilseeds, fibres, tubers, spices, fruits and flowers to support grain/fruit filling, sugar movement and stress tolerance in the later part of the crop's growth. This page lists its role in plant nutrition, key benefits and the recommended growth-stage-based application as per manufacturer labels.

Which Crop Stage Is This For?

This high-potassium, phosphorus-free fertilizer grade is generally matched to specific crop stages rather than applied as a routine spray. The table below maps the crop categories covered on this page to the growth stage or deficiency symptom this grade is typically used for.

Role in Plant Nutrition

NPK 13:00:45 supplies nitrogen and potassium together in fully water-soluble form, allowing rapid foliar absorption directly through the leaf surface in addition to normal root uptake. The nitrogen component supports continued vegetative vigour and chlorophyll formation, while the high potassium (K₂O) content drives sugar manufacturing and its transport from leaves to developing grain, fruit or storage organs, activates key plant enzymes, and strengthens the plant's tolerance to weather stress, pests and disease. Because it carries no phosphorus, this grade is typically used from the later vegetative stage through grain-filling/fruit development, when the crop's potassium demand for yield-building and quality (grain size, fruit weight, oil content, brightness) is at its highest.

Features & Benefits

• Fully water-soluble, foliar-absorbed source of nitrogen and potassium, usable across a very wide range of field, vegetable, fruit and flower crops.
• Supports sugar manufacturing and transport, increasing grain size, fruit weight and oil content in oilseed crops.
• Strengthens the crop's tolerance to weather stress and pest/disease pressure through balanced potassium nutrition.
• Compatible with most insecticides and fungicides, allowing combined tank-mix application in many cases (always confirm compatibility before mixing).

Recommended Usage of NPK 13:00:45 Fertilizer

The table below gives the commonly recommended foliar spray dose and timing, as listed on manufacturer labels for this fertilizer grade. Dosage varies by formulation — water-soluble powder brands and liquid suspension brands are dosed differently — so always confirm the specific product's label before use.

A minimum of two foliar sprays is generally recommended per season, with additional sprays possible depending on crop type and nutrient requirement. Doses above are the commonly listed formulation-label rates; always confirm the current pack label for the specific brand and formulation you are using, and consult your local agricultural extension office for crop-specific guidance.

How to Use

1. Identify your crop's current growth stage and confirm the correct dose per pump/acre for your specific product formulation (powder or liquid) from the current label.
2. For water-soluble powder, dissolve the required quantity fully in a small amount of water before adding to the spray tank; for liquid suspension, shake well and measure the required quantity directly.
3. Spray using a knapsack or power sprayer fitted with a fine mist nozzle for uniform coverage of the crop foliage, preferably during the early morning or late evening to reduce evaporation.
4. Time sprays from the later vegetative stage through grain-filling or fruit development, when the crop's potassium demand for yield and quality is highest.
5. If tank-mixing with an insecticide or fungicide, do a small jar-compatibility test first to confirm the products mix cleanly.

Precautions & Safety

• Wear basic protective clothing and gloves while mixing and spraying, as a routine precaution for any agricultural input.
• Avoid spraying during peak heat or bright sunshine, as foliar nutrient sprays are best absorbed and least likely to cause leaf scorch during cooler parts of the day.
• Store in the original, tightly closed container/pack in a cool, dry place away from direct sunlight, food, feed and out of reach of children and livestock.
• Confirm the specific dose for your product's formulation (powder vs. liquid suspension) before mixing, since the two formats are not dosed the same way per acre.
• Follow your local agricultural extension advice on combining this foliar fertilizer with your overall soil-nutrition program, since it is a supplement to, not a replacement for, balanced soil fertilization.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling or spraying.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.