Support vigorous foliage, stem and root development during the vegetative growth phase.

HESI TNT Complex is a complete NPK fertiliser for plants grown in soil and coco-based substrates. Most of its nitrogen is supplied in organic form, helping maintain a comparatively low salt concentration and EC while providing the nutrition required for sustained green growth.

• Predominantly organic nitrogen: Supports vegetative growth while maintaining a lower salt concentration than many strongly mineral-based growth feeds.
• Complete growth nutrition: Supplies primary nutrients, other macronutrients and trace elements in one formula.
• Low EC contribution: Makes the fertiliser suitable for extended use, including mother plants and plants kept in smaller containers.
• Added vital substances: Support the metabolic and photosynthetic processes involved in producing new plant tissue.
• Flexible application: Suitable for hand-watered pots, containers and irrigation systems using soil or coco-based substrates.
• Reduced dosage option: Can be used at half strength for young plants or continuous feeding.

The organic form of much of the nitrogen should not be confused with organic certification. TNT Complex is formulated for low-salt vegetative feeding but is not presented as a certified organic fertiliser.

Use TNT Complex for:

• Aroids and other foliage houseplants
• Plants producing active vegetative growth
• Mother plants maintained over extended periods
• Young plants and established cuttings
• Indoor pots and containers
• Garden and terrace plants
• Soil and coco-based substrates

TNT Complex is primarily a growth-phase fertiliser. Flowering plants may require a bloom-specific nutrient formula once their nutritional priorities change.

It is not intended as the standalone base nutrient for pure hydroponic or fully mineral semi-hydroponic systems. Use a fertiliser formulated for hydroponic cultivation in those setups.

Standard dosage

Mix 5 ml per litre of irrigation water, equivalent to 50 ml per 10 litres.

Apply through the growing medium as part of the plant’s normal watering routine. Mix thoroughly before watering pots, containers or compatible irrigation systems.

Reduced dosage

Mix 2.5 ml per litre for:

• Very young seedlings
• Established cuttings
• Plants receiving fertiliser continuously over an extended period
• Plants growing slowly under lower light
• Substrates that already contain some nutrition

Seeds contain stored nutrients for their earliest development. Begin feeding seedlings once they are establishing active growth and using the reserves held in their cotyledons. Do not rely solely on the cotyledons falling off, as the correct starting point also depends on the species and growing medium.

Avoid applying an unnecessary extra watering solely to deliver fertiliser. Adjust the concentration and frequency according to the plant’s growth rate, light, substrate and existing nutrient supply.

Declared nutrient composition:

• NPK 3-2-3
• Complete macronutrient supply
• Trace elements
• Additional plant-active substances

HESI does not provide the individual concentrations of every trace element or added vital substance in the product description.

Available bottle sizes:

• 0.5 L
• 1 L

Every option includes one bottle in the selected size. Choose the bottle only or the option containing one measuring pipette and one holder.