Best mycorrhiza: garden pouch, small session or hydro
Updated: October 2026
You want a shortlist, not another catalogue of every mycorrhiza pouch on amazon.co.uk. Best mycorrhiza in this set means a named garden inoculant with enough UK reviews to trust the label, plus a cheaper 150 g option for a short session, and a hydro powder only when the system is named. The full grid stays on the [mycorrhiza comparison](/hub/fertiliser-soil-and-bark-mulch/mycorrhiza). Figures below are the listing prices and star lines, not a live crawl and not a lab ranking.
You want a shortlist, not another catalogue of every mycorrhiza pouch on amazon.co.uk.
You want a shortlist, not another catalogue of every mycorrhiza pouch on amazon.co.uk. Best mycorrhiza in this set means a named garden inoculant with enough UK reviews to trust the label, plus a cheaper 150 g option for a short session, and a hydro powder only when the system is named. The full grid stays on the mycorrhiza comparison. Figures below are the listing prices and star lines, not a live crawl and not a lab ranking.
Our top picks
| Badge | Product | Review file | Form | Job | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Empathy Empathy Rootgrow mycorrhizal fungi 360 g | 4.6 from 2,864 | Granules | Garden planting | 8.8 | about £10.34 | View offer |
| Best value |  Plantworks Ltd Plantworks Rootgrow mycorrhizal fungi 150 g | 4.5 from 2,948 | Powder; reviews say grains | Short garden session | 8.4 | about £6.79 | View offer |
| Alternative |  TNC TNC MycorrHydro soluble mycorrhizal fungi 75 g | 4.3 from 155 | Water-dispersible powder | NFT, flood and drain, DWC | 7.2 | about £14.25 | View offer |
On this page
Default garden pick
The garden default here is Empathy Rootgrow 360 g (B0057WVGCW): granules, £10.34, 4.6 from 2,864 reviews, Plantworks Ltd, model RG360. Saved reviews describe tomatoes, roses, shrubs and bare-root hedging when the granules coat the roots. Watering the product in like fertiliser is described as waste.
The Royal Horticultural Society endorses Empathy Rootgrow for quality assurance and native provenance. That is not a test we repeated. The 360 g listing still prints item weight 25 g and liquid volume 360 ml, which disagree with the name. Trade figures of about 5 g for a 9 cm pot are brand copy. Three small pots make 360 g oversized. How you apply it is on how to use mycorrhiza.
Best value for a small session
Plantworks Rootgrow 150 g (B00EHGUP5S) is £6.79, 4.5 from 2,948 reviews: the lowest named Rootgrow price and the largest review count. One reviewer used half a pack on two crab apples and five dwarf apples, sprinkled so it touched the roots. The listing says powder. UK reviews describe large grains. A buyer of two packs says neither contained a scoop, and an opened packet picks up damp if you reach in with soil on your hands.
The RHS-branded 150 g pouch (B0057MW5FO) is £7.59, 4.6 from 92 reviews, with Empathy as manufacturer and a printed sprinkle-in-the-hole line. Same garden job, thinner evidence, slightly higher shelf price. Buy it only if you want that branding. A long hedge still points at 360 g on pence per gram.
Hydro-only pick
TNC MycorrHydro 75 g (B00A9U7DII) is the hydro pick, not a second garden winner. It is £14.25, 4.3 from 155 reviews, made in the United Kingdom by The Nutrient Company. The listing names NFT, flood and drain, DWC and hand watering, with Trichoderma and bacteria on the label. It is the only kept ASIN that states those systems. Reviewers report poor dissolving, a clogged watering-can rose and blocked narrow lines. Sentences about fewer nutrients are seller claims, not an authorisation. The form contrast is on mycorrhiza powder vs granules.
What we would not pick first
Ghjkldha B0DCVKY3HL is £7.59, 4.3 from five reviews, with 1.0 ml, 100 g and 132 g in different fields. It is not Empathy Rootgrow. BioTabs Mycotrex 100 g is £28.98, 5.0 from three reviews and no UK review text. The 700% root-volume bullet was not measured. The 360 g plus bulb-starter bundle is £22.78 from two reviews, useful only if you already wanted about 50 bulbs. RootMax has 2,208 reviews at 4.5, yet £33.78 is the dearest row and the title mixes rooting powder with mycorrhizal fungi.
For a normal garden session, take the 360 g pouch. For a few pots, take the 150 g. Take MycorrHydro only for a named tank.
Common questions
Which pouch is the default garden pick in this set?
Empathy Rootgrow 360 g at £10.34, 4.6 from 2,864 reviews. It is a named granule pouch with the largest garden sample after the 150 g sibling. The RHS endorses that line. This page did not re-test every ASIN. Use the 150 g pouch instead if you only have a few pots.
Which pouch is best value for a small planting session?
Plantworks Rootgrow 150 g at £6.79, 4.5 from 2,948 reviews. It is the lowest named price and the largest review count. The listing says powder. Reviews describe grains. The RHS 150 g pouch costs more and has only 92 reviews.
Is the RHS-branded 150 g pouch a different fungus?
Not on the evidence in this set. Manufacturer is Empathy, plants named match the other Rootgrow pouches, and the instruction is sprinkle in the hole. You are paying for branding and a thinner review line, not a second species list we can quote.
When is TNC MycorrHydro the pick instead?
When you already run NFT, flood and drain, or DWC and want a water-dispersible powder that names those systems. It is £14.25 and 4.3 from 155 reviews. Reviewers report poor dissolving and blocked lines. It is not the garden default.
Why not pick BioTabs at 5.0 from 3 reviews?
Three ratings and no UK review text are not the same evidence as thousands of Rootgrow reviews. The tub is £28.98, about 29 pence per gram, and the 700% root-volume line is an untested bullet. Keep it only if you already buy that blend.
Is RootMax’s twin pack better because of 2,208 reviews?
The sample is large and the star line is 4.5, but the price is £33.78 and the title mixes rooting powder with an inoculant. Reviewers also say the pack looks smaller than the photos. It is a twin dry powder, not a better first buy than named Rootgrow.
Does RHS endorsement mean every Rootgrow ASIN was lab-tested here?
No. The endorsement is of the Empathy Rootgrow line. This comparison used amazon.co.uk listings, review counts and public UK sources. Nobody here ran a colonisation trial or ranked every pouch as a laboratory top pick.
Related pages
Sources
Public UK and maker sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the eight amazon.co.uk listings in that digest. An organic bullet is not a licence number. A root-volume line and a spore count were not measured here. No pouch is treated as a cure for rose sickness or as a UKCA-approved biostimulant.
- RHS, Mycorrhizal fungi (retrieved 20 October 2026)
- RHS, Trees and shrubs planting (retrieved 20 October 2026)
- RHS, Biostimulants (retrieved 20 October 2026)
- RHS, Replant disease (retrieved 20 October 2026)
- HSE, Biostimulants and plant protection (retrieved 20 October 2026)
- GOV.UK, Manufacturing and marketing fertilisers (retrieved 20 October 2026)
- AHDB, How should biostimulants be used? (retrieved 20 October 2026)
- Empathy, rootgrow 360 g (retrieved 20 October 2026)