NPK 13-40-13+TE

NPK 13-40-13+TE supplies a high phosphate loading with nitrogen carried only as nitrate and ammonium, no urea, for growers who want strong rooting and early reproductive support with predictable feeding. Its phosphate leads but not overwhelmingly, so meaningful nitrogen and potassium stay in the mix: the grade sustains the crop through development rather than acting as a one-off trigger, and can run across a broader window. The ammonium-led nitrogen helps keep phosphorus available, while a balanced potassium fraction and EDTA-chelated micronutrient package round out the grade. Fully water-soluble, it dissolves to a clear solution suited to soilless and precision fertigation systems. At 1:3:1, its phosphate skew is moderate, enough to lead the feed without starving the crop of the nitrogen and potassium it still needs.

Key Benefits

• Supports rooting and early reproductive growth. The high phosphate feeds phosphorus for root development and the energy transfer of early flowering and fruit set.
• Feeds phosphorus without urea. Nitrogen is supplied only as nitrate and ammonium, avoiding urea’s conversion lag and suiting precision and soilless systems where nitrogen behaviour must be predictable.
• Uses ammonium-led nitrogen to aid phosphorus uptake. The ammonium-dominant nitrogen is held in the root zone and mildly acidifies the rhizosphere, helping keep phosphorus soluble and available.
• Keeps potassium balanced for early quality. The balanced potassium supports water regulation and stress tolerance through establishment and early development.
• Tops up trace elements in available form. EDTA-chelated iron, manganese, zinc, copper, boron and molybdenum stay soluble and root-available across typical solution pH.

How It Works

NPK 13-40-13+TE is a fully water-soluble mineral fertiliser that dissolves to a clear solution and delivers nitrogen, phosphate and potassium as plant-available ions, taken up through the roots in fertigation or through the leaf in foliar application. Because the nutrients are already in mineral, ionic form, the crop uses them without further breakdown, so the ratio in the tank is what shapes the feed the plant receives at each stage.

Its nitrogen is carried about 34% as nitrate and 66% as ammonium, with no urea: the ammonium-dominant share is held in the root zone and mildly acidifies the rhizosphere, helping keep the high phosphate soluble and available to developing roots, while the absence of urea means no hydrolysis lag and predictable behaviour in the tank and root zone. Phosphorus drives root growth and the energy transfer of early flowering, while the EDTA-chelated micronutrients stay soluble and root-available across typical solution pH rather than locking up as unavailable forms.

When to Use NPK 13-40-13+TE

Use it for rooting and early reproductive development where a urea-free nitrogen profile is preferred.

• NPK 13-40-13+TE suits establishment and rooting in soilless and precision fertigation systems.
• It supports the transition from rooting into early flowering and fruit set.
• It fits crops where a urea-free, high-phosphate feed is required for solution control.

Run it as a sustaining developmental feed through rooting and into early flowering, where its retained nitrogen and potassium let it work over a longer window than a short-lived initiation grade; reach for a strongly phosphate-dominant starter instead when a brief, decisive rooting trigger is needed, and a magnesium-containing bloom grade for full flowering.

Its ammonium-dominant nitrogen acidifies the root zone, which helps keep phosphorus available; monitor pH on substrates that are already acidic.

Application

Rates scale with crop, stage and system. As a starting point, dissolve at 1 to 2 g/L on establishing and early reproductive crops, easing to 0.5 g/L for young or sensitive crops and in soilless systems, and keep solution EC within tolerance. For foliar use stay at the low end and spray in the cooler parts of the day.

Use the guide below as a crop-group starting point, then fine-tune to local water quality, growth stage and the crop’s salinity tolerance. Fertigation figures are concentrations for constant feeding in the irrigation water; foliar figures are spray concentrations.