Growth Technology Nitrozyme — Concentrated Kelp Extract Growth Enhancer for Plants
Best for: Growers wanting faster vegetative growth, stronger cuttings, and better stress tolerance without faffing about with complicated additives
Our thoughts
Nitrozyme is one those products that actually delivers on what it promises. It's a concentrated marine kelp extract that's been tested properly and used commercially for years. If you're serious about getting plants to the flowering stage faster and keeping them resilient under stress, this does the job. A little goes a long way, which is why growers keep coming back to it.
Nitrozyme is a highly concentrated seaweed extract derived from Ascophyllum Nodosum kelp harvested from the North Atlantic. It's packed with natural plant growth hormones — cytokinins, auxins, enzymes, and gibberellins — plus essential micronutrients and plant growth regulators that trigger faster vegetative growth and improve stress tolerance. Unlike dilute alternatives, Nitrozyme is processed and purified to maintain high hormone levels, so you're not paying for water.
How it compares
In the kelp extract market, Nitrozyme sits at the performance end.
- Higher cytokinin concentration than most competitors — better for shoot initiation and lateral bud development
- Canadian-tested and commercially proven across multiple crop types
- Works across soil, coco, and hydroponic systems with both root drench and foliar application
- Concentrate format means less volume waste and simpler dosing than cold-pressed alternatives
You'll pay more per bottle than budget kelp products, but the concentration means you're using less per application. Growers who've switched from dilute alternatives typically don't go back.
Usage guidance
Foliar feeding (recommended)
Add 5ml per litre of water, mix well, and spray plants top to bottom — ensure leaf undersides are thoroughly wetted. Best applied during vegetative phase for maximum effect, but can be used throughout the growing cycle.
Root zone application
Soil and coco: add 1-2ml per litre to your feed water. Hydroponic systems: use 5-10ml per litre of reservoir. Works in all media types — soil, coco, NFT, DWC, flood and drain.
Stage-specific timing
Apply to stock plants 2-3 weeks before taking cuttings to trigger vigorous new shoot growth. Treat seedlings and cuttings immediately for faster rooting and establishment. Use during vegetative phase to accelerate growth — timing matters, as the plant will amplify whatever growth phase it's already in.
Stress relief
Nitrozyme improves plant tolerance to temperature, humidity, and watering stress. Growers often apply it when plants are under pressure.
Technical specifications
- Active ingredient: Ascophyllum Nodosum marine kelp extract
- Contains: Cytokinins, auxins, enzymes, gibberellins, ethylenes, micronutrients, and plant growth regulators
- Source: Canadian cold-harvested and purified
- Concentration: Highly concentrated — small dosages required
- Available sizes: 300ml and 1L bottles
- Application methods: Foliar spray, root drench (compatible with all growing media)
- Shelf life: Standard storage conditions required
Who this is for
- Propagation specialists wanting faster, more vigorous cuttings and seedlings
- Hydroponic and coco growers optimising vegetative growth rates
- Commercial and semi-commercial operations prioritising yield and stress resilience
- Anyone running multiple crops who needs plants ready for the next stage faster
- Growers dealing with environmental stress and wanting to build plant hardiness
Our take
This is proper plant science in a bottle. The research backing it is solid — trial data shows 44% better germination rates, 57% more leaf development, and five fewer days to flowering. That's not marketing noise, that's real improvement.
It's not the cheapest kelp extract on the market, but concentration and proven commercial track record justify the price. A little goes a long way, and growers using this consistently report noticeable improvements in plant vigour and stress tolerance. Worth picking up if you're serious about getting better results without overcomplicating your feed schedule.
