Using Dynomyco mycorrhizal correctly will make a real difference to your results. Dynomyco Mycorrhizal is one of the most scientifically grounded products in indoor growing — not a marketing concept, but a genuinely effective biological tool that harnesses one of nature’s oldest and most successful plant partnerships. Mycorrhizal fungi have co-evolved with plant roots for over 400 million years, and the symbiotic relationship they form extends the plant’s effective root system by orders of magnitude. Used correctly at the right stage of growth, Dynomyco delivers measurably larger root networks, improved drought tolerance, better nutrient uptake, and more resilient plants throughout the growing cycle.
How Does Dynomyco Mycorrhizal Work?
When mycorrhizal fungi spores come into contact with living plant roots, they colonise the root tissue and form a dense network of microscopic filaments called mycelium. This fungal network extends far beyond what roots could physically reach on their own — sometimes increasing the effective surface area for water and nutrient absorption by 100 to 700 times compared to uncolonised roots.
The relationship is mutually beneficial. Plants share photosynthetic sugars with the fungi through root tissue. In exchange, the fungal network brings back water, phosphorus, zinc, copper, and other minerals from areas of the growing medium the plant’s own roots would never reach. This underground partnership is why plants with established mycorrhizal colonies consistently outperform uninoculated plants in terms of nutrient efficiency, drought recovery, and overall vigour.
Dynomyco uses strains from the Glomus and Rhizophagus families — the most effective genera of arbuscular mycorrhizal fungi (AMF) for agricultural and horticultural use. These are the strains with the strongest evidence base for improving plant performance in container growing.
How to Use Dynomyco Mycorrhizal
Dynomyco is a granular powder that’s applied directly to the root zone at the point of transplanting or seeding — not a liquid additive. The key is getting the inoculant into direct contact with live root tissue so colonisation can begin immediately.
At Transplanting (Recommended Method)
- Dust the root ball of the seedling or cutting directly with Dynomyco granules before placing it into the new container
- Alternatively, sprinkle Dynomyco into the bottom of the planting hole before lowering the root ball in
- Dose: 15–30g per plant (approximately 1–2 tablespoons)
- Ensure the granules are in direct contact with root tissue — they cannot colonise without physical contact with live roots
- Fill and firm the container as normal, then water in gently
When Mixing Growing Medium
- Mix Dynomyco evenly through your growing medium before filling containers
- Dose: 5–10g per 5 litres of growing medium (approximately 1–2 teaspoons per 5L)
- This method works well when preparing large batches of media for multiple containers
For Seeds
- Dust seeds lightly with Dynomyco powder before sowing, or place a small amount of granules around each seed at sowing depth
- Use the 5–10g per 5L mixing ratio for the propagation medium if direct seed dusting isn’t practical
Critical Tip: Phosphorus and Mycorrhizal Colonisation
This is the most important piece of advice I give growers using any mycorrhizal product: high phosphorus levels in your nutrient solution suppress mycorrhizal colonisation. This is well documented in plant biology — when phosphorus is already abundant in the root zone, plants have no incentive to maintain the energetically costly relationship with fungi. The mycorrhizal network fails to develop, and you’ve wasted your inoculant.
For Dynomyco to colonise effectively, keep phosphorus levels moderate — particularly in the first 2–4 weeks after inoculation. Use the lower end of your base nutrient’s recommended dose range during this establishment period, and avoid high-phosphorus root stimulators during the first few weeks. Once colonisation is established (typically 3–4 weeks), you can resume a normal feeding schedule.
Compatible Growing Media
Dynomyco Mycorrhizal performs best in media with some organic content where the fungal network can establish and spread:
- Soil: Ideal — organic soil provides the best environment for mycorrhizal establishment and the broadest range of minerals for the fungal network to source
- Peat-based media (including Canna Terra, Plagron Promix): Works very well — the organic content supports fungal development even without a full soil microbiome
- Coco coir: Can work, but results are less consistent — coco’s inert nature provides fewer of the mineral reservoirs that the fungal network is evolved to access. Use at the higher end of the dose range
- Pure hydroponics (DWC, NFT, rockwool): Not suitable — mycorrhizal fungi require a solid substrate to establish. There’s no benefit to adding Dynomyco to purely solution-based systems
When to Apply
Apply Dynomyco at the earliest opportunity — ideally when seeds are sown or cuttings are first placed into their rooting medium. The sooner colonisation begins, the longer the fungal network has to establish before the plant’s peak nutrient demand during flowering. Applying at transplant into the final container is the next best option. Applying mid-grow to already-established plants is possible but less effective, as the root zone is already dense and introducing inoculant without direct root contact is unreliable.
Available Sizes
Dynomyco Mycorrhizal is available in a 100g pouch and a 200g bag. At 15–30g per plant, the 100g pouch provides enough product for 3–6 plants — ideal for home growers running a small setup. The 200g bag covers 6–13 plants and offers better value per gram for those running larger spaces or multiple grows per year.
Frequently Asked Questions
Does Dynomyco need to be applied every grow?
Yes — for each new grow, or whenever plants are moved into fresh growing medium. Mycorrhizal colonisation doesn’t transfer between grows, and fresh media won’t contain established fungal networks. Apply Dynomyco at every transplant or new seed sowing for consistent results.
Can I use Dynomyco alongside beneficial bacteria products?
Yes — mycorrhizal fungi and beneficial bacteria (such as Bacillus subtilis or Trichoderma species) work synergistically. They occupy different niches in the root zone and generally enhance rather than compete with each other. This combination provides excellent overall root zone health.
Will fungicides or high-phosphorus nutrients kill the mycorrhizal fungi?
Yes to both. Fungicides — including many systemic ones — will damage or destroy mycorrhizal fungi in the root zone. Avoid applying fungicides for the first 4–6 weeks after inoculation if possible. High phosphorus, as discussed above, suppresses colonisation. Time applications of phosphorus-heavy boosters carefully around the establishment window.
Is Dynomyco suitable for organic growing?
Yes — Dynomyco is a biological product containing live fungal spores and is fully compatible with organic growing programmes. It actually performs particularly well in organic systems where synthetic phosphorus isn’t creating suppression, and the broader microbial ecosystem in organic media supports fungal establishment.
Where can I buy Dynomyco Mycorrhizal in the UK?
We stock Dynomyco Mycorrhizal in both the 100g and 200g sizes as part of our range of plant nutrients and growing additives. If you have questions about how to incorporate mycorrhizal inoculants into your specific growing setup, our team is happy to advise.
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Further Reading From The Horticulture Company
For more expert growing guides, our nutrients and additives guide explains how to build an effective feed programme, while our LED grow lights comparison and grow tents guide help you optimise your setup. The indoor growing environment guide covers temperature, humidity and CO₂, and the complete UK grow tent guide takes you through setup from scratch.
For authoritative guidance on plant nutrition and health, the Royal Horticultural Society publishes evidence-based growing advice used by professionals and hobbyists alike. Visit The Horticulture Company’s store in Kenilworth, Warwickshire, or browse our full range of products and guides online.
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