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Citadel™

Brace the plants innate biological processes with organic carbon, humic extracts and naturally plant derived nutrients.

High efficiency magnesium delivery
Boosts chlorophyll, photosynthesis and plant energy
Prevents magnesium deficiency before it impacts yield

SKU: CITADEL Crops: , , , , , Challenge:

CITADEL™ is an innate combination of significant plant bio-stimulant properties. It features a natural blend of amino acids and high levels of carbon, facilitating the restructuring of inorganic nitrogen into amino acid building blocks for protein synthesis.

CITADEL™ contains a highly concentrated blend of:

  • • Humic extracts
  • • Free L-amino acids
  • • Essential Proteins
  • • Complex Sugars & Carbohydrates
  • • High-load Organic Carbon
  • • Macro, Meso, and Micro elements

Formulated for rapid uptake and microbial activation.

CITADEL™ — Naturally Fortify Your Crops With Bio-Active Carbon

Healthy crops start with healthy soils — and CITADEL™ is designed to energize both. It is an advanced bio-stimulant blend built from humic extracts, amino acids, and rich carbon, giving crops a powerful toolkit to grow stronger, recover faster, and thrive under stress.

Whether applied to soil, used as a starter fertiliser, or sprayed as a foliar, CITADEL™ delivers fast, plant-ready nutrition that fuels growth and strengthens the plant’s natural ability to withstand environmental challenges.


Unlock Stronger Growth Through Natural Biochemistry

CITADEL™ helps plants convert inorganic nitrogen into amino acids, the essential building blocks of proteins. By supplying amino acids in a directly usable form, the plant saves metabolic energy, supporting:

  • Faster growth and biomass production
  • Increased root activity and exploration
  • Improved plant structure and shoot development
  • Stronger response to environmental stress

Restore Soil Health & Build Resilience

The humic extracts and carbon compounds in CITADEL™ feed beneficial soil microbes, driving improved soil structure and nutrient cycling. This biological activity supports:

  • Enhanced soil fertility and nutrient release.
  • Improved moisture retention, infiltration, and drainage.
  • A more resilient environment for long-term productivity and sustainability.

Rich Carbon: A Powerful Fuel for Microbial Life

CITADEL™ includes an ample supply of carbon rich in carbohydrates and sugars, ensuring microbes have the immediate energy they need to flourish. This boost in microbial activity improves the decomposition of organic matter and enhances nutrient mineralisation.

During heat, drought, or other abiotic stress, these sugars help maintain cellular processes and protect the plant's internal metabolism.


Improved Plant Resilience & Natural Defence

By strengthening internal pathways and natural biochemistry, CITADEL™ enhances the plant’s ability to handle challenges, including:

  • Rapid wound recovery and pathogen suppression.
  • Improved disease resistance.
  • Better adaptation to drought, cold, heat, and salinity.

Balanced Nutrition From Plant-Derived Minerals

With a naturally occurring blend of macro and trace minerals in a bio-available form, CITADEL™ ensures plants receive balanced nutrition that supports vigorous photosynthesis and improved crop quality.


Why Choose CITADEL™?

  • ✔ Boosts soil biology and microbial activation
  • ✔ Improves nitrogen and nutrient-use efficiency
  • ✔ Delivers plant-ready amino acids and organic carbon
  • ✔ Versatile application: Soil conditioner, seedbed starter, or foliar spray

Nurture your soil. Strengthen your crops. Choose CITADEL™.

CITADEL™ is an innate combination of significant plant bio-stimulant properties. It features a natural blend of amino acids and high levels of carbon, facilitating the restructuring of inorganic nitrogen into amino acid building blocks for protein synthesis.

Crop Timing Rate L/ha Water rate L/ha
Cereals Pre-drilling / Drilling * 5-75 * 60-80
Pre-emergence 5-10 100-200
Construction phases 10-15 100-200
Production phases 15-20 100-200
Fodder / Sugar Beet Pre-drilling / Drilling * 5-75 * 60-80
Pre-emergence 5-10 100-200
Construction phases 10-15 100-200
Production phases 15-20 100-200
Grassland Pre-drilling / Drilling * 5-75 * 60-80
Pre-emergence 5-10 100-200
Construction phases 10-15 100-200
Production phases 25-30 100-200
Oilseed Rape, Pulses Pre-drilling / Drilling * 5-75 * 60-80
Pre-emergence 5-10 100-200
Construction phases 10-15 100-200
Production phases 15-20 100-200

* Pre-drilling or drilling applications above 20 L/ha can be applied neat or with water according to liquid applicator requirements.


  • • Use as part of a good agronomic programme (INM strategy).
  • • Consider weather conditions at time of application.
  • • Tank mixing: jar test pre-application and patch test to check for adverse reactions.
  • • Contact your AIVA FERTILISER Nutrition Consultant for advice regarding CITADEL™.

Please see product label for specific directions of use.

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