In StockHesi TNT Complex
£31.46£34.95Save £3.49
In stock
Available from our Bristol shop
This item is too big for our parcel service, so we don't sell it for delivery on the website. Buy it in the shop, or contact us for a delivery quote.
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Description
Hesi TNT Complex is a ‘Grow’ fertiliser specially designed for plants grown in soil or coir-based substrates.
Packed with organic nitrogen and essential nutrients, it delivers rapid and vigorous growth without stressing your plants.
Key benefits of Hesi TNT Complex:
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Explosive Growth – Provides fast and healthy vegetative growth thanks to organic nitrogen that’s easily absorbed by plants.
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Enriched Formula – Includes vital nutrients, trace elements, vitamins and amino acids to promote all-round plant health.
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Low EC Value – Offers high nutrient content without increasing electrical conductivity, protecting delicate root systems.
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Gentle on soil – Low salt content ensures no root burn and keeps soil structure intact.
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Easy to use – All products in the Hesi range are colour-coded with an easy-to-follow Hesi Grow Schedule, making it an ideal solution for inexperienced growers and experts alike.
Perfect for indoor and outdoor growers looking to maximise flower production with minimal fuss. Use at half strength for young plants and up to 5ml per litre for the remainder of the veg phase.
It is important to bear in mind that the majority of the Nitrogen content is organic-source nitrogen so you should not work to an EC reading when using this product.
Key facts
| Type | Grow fertiliser |
|---|---|
| Growing medium | Soil or coir-based mixes |
| Contains | Organic nitrogen, trace elements, vitamins and amino acids |
| EC | Low: most of its nitrogen is organic, so don't feed to an EC reading |
| Dose | Half strength for young plants, then up to 5 ml per litre for the rest of the vegetative stage |
| Brand | Hesi |
| Sizes | 1, 5, 10 and 20 litres |
| Category | Base Nutrients |
How to use
Use TNT Complex through the vegetative stage. Start young plants at half strength, then feed up to 5 ml per litre for the rest of veg.
Most of the nitrogen in TNT is organic and does not conduct electricity, so an EC meter will read low. Feed by dose, not by EC. You can still check the pH with a pH meter.
For flowering in coco, Hesi advise switching to Hesi Coco. The Hesi range is colour-coded and follows one grow schedule.
Questions
Why does my EC read low with TNT?
Most of its nitrogen is organic, which does not conduct electricity. Go by the dose, not the EC.
What is the dose of TNT Complex?
Half strength for young plants, then up to 5 ml per litre for the rest of the vegetative stage.
Growers’ guides
- Which Nutrients for Soil, Coco or Hydro? Base Feeds ComparedWhich plant nutrients to buy for soil, coco or hydroponics: the base feeds we sell compared, Plant Magic or Biobizz, hard or soft water, and how to choose.
- Hesi Feed Chart: Soil and Coco Grow Schedules Week by WeekThe Hesi feed chart for soil and coco, week by week in ml per 10 litres: TNT Complex, Bloom Complex, Hesi Coco, PK and boosters, from Hesi's own schedules.
- Coco Coir Guide: Choosing, Feeding and Reusing CocoWhat coco coir is, the coco mixes worth buying, how it compares with clay pebbles and rockwool, and how to feed and reuse it.
