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Cannabis fertiliser buying guide

Updated: October 2026

You are on an amazon.co.uk hydroponic shelf where a 250 ml booster, a two-bottle coco set and a sugar liquid all use flower language. A cannabis fertiliser buying guide is useful only if it sorts the job before the brand. This page is that decision tree for the eleven liquids in our [cannabis fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/cannabis-fertiliser). Prices and star lines come from those listings on 19 October 2026. The Products Compared editorial team did not run a lab test. A qualifying purchase can earn a commission at no extra cost to you. Cultivating cannabis in the UK needs a Home Office licence, and buying a bottle does not grant one.

You are on an amazon.co.uk hydroponic shelf where a 250 ml booster, a two-bottle coco set and a sugar liquid all use flower language.

Our top picks

CANNA CANNA Coco A and B 1L set

Best overall

CANNA CANNA Coco A and B 1L set
9.4/10about £17.56
View offer
Advanced Nutrients Advanced Nutrients Big Bud 250 ml

Alternative

Advanced Nutrients Advanced Nutrients Big Bud 250 ml
9.0/10about £12.25
View offer
Advanced Nutrients Advanced Nutrients Bloom pH Perfect 500 ml

Preis-Tipp

Advanced Nutrients Advanced Nutrients Bloom pH Perfect 500 ml
9.0/10about £10.62
View offer
On this page
  1. 1.Start with the job on the label
  2. 2.Then match the medium
  3. 3.Read the pack twice
  4. 4.What this purchase does not do

Start with the job on the label

The first split is the job on the bottle. A base, a booster, a carbohydrate additive and a trace mix are different purchases. A base is the listing that presents itself as the main feed. Here that is CANNA Coco A and B, offered twice, plus two bloom liquids: Advanced Nutrients Bloom pH Perfect and CANNA Bio Flores. A flower booster is Big Bud, Big Bud Coco or Bud Ignitor. A carbohydrate additive is Bud Candy or Sugar Shot. CANNA Trace Mix is a trace supplement, and the bullets do not call it a complete feed.

Then match the medium

A coco title is a different product from a bottle that never says coco. Four ASINs say coco. B003VN7272 and B0090HMR9G are the A and B bases. B00V4QS74K and B07D3ZGPY6 are both titled Big Bud Coco 250 ml. Those two are boosters with coco in the name, not a second base. The coco fertiliser or soil fertiliser page stays on that medium split. If the title is silent, treat the medium as unknown.
CANNA CANNA Coco A and B 1L set

Testsieger

CANNA CANNA Coco A and B 1L set
9.4/10about £17.56
View offer

Read the pack twice

Several files print two volumes. Do not collapse them into one number the page never chose. Big Bud B004TENZMI says 250 ml in the title and also contains the text 250 litres. The unit count is 250 ml and the liquid-volume field says 240 ml. Big Bud Coco B00V4QS74K says 250 ml in the title, while the unit count says 8.45 millilitres and the liquid volume says 8.45 fl oz. CANNA Coco A+B B0090HMR9G says 1L in the title, while the liquid-volume field says 2 litres and the item weight is 2.48 kg. None of these Amazon tables print N, P2O5 and K2O. The how to read a fertiliser label page stays on that gap.

What this purchase does not do

Section 6 of the Misuse of Drugs Act 1971 makes cultivating cannabis unlawful unless regulations allow it. Regulation 12 of the Misuse of Drugs Regulations 2001 allows it only under a Home Office licence. A fertiliser listing is a sale of plant food. None of that turns a booster into permission to grow. This comparison does not claim that any bottle increases weight, potency or flavour. If concentrate is swallowed or enters an eye, use NHS 111. Use bloom booster or base fertiliser when the only remaining question is whether the bottle is the main feed or an extra.

Common questions

Is a booster enough on its own?
No. In this folder a booster is Big Bud, Big Bud Coco or Bud Ignitor, and each listing describes an extra rather than the main feed. The bases are the two CANNA Coco A and B offers, Bloom pH Perfect and Bio Flores. Bud Candy, Sugar Shot and Trace Mix are further extras. Choose the base that matches the job first, then decide whether an extra is the bottle you came for.
What should I buy if the title says coco?
Buy a coco title only when coco is the medium you are matching, and still check the role. B003VN7272 and B0090HMR9G are coco bases. B00V4QS74K and B07D3ZGPY6 are coco boosters. Big Bud without the word coco, B004TENZMI, is a different listing. A bullet that adds soil or hydroponics does not cancel the coco name on the title.
What is the difference between a 250 ml booster and a 1 litre base?
The 250 ml Big Bud listings are flower boosters. The litre figure on the coco sets belongs to a base sold as A and B. A larger pack is not a more complete product. Bud Candy is 1 litre and is still a carbohydrate additive. Compare the role first, then the price on the main table, and read any second volume field before you treat the title as the only size.
Does the Amazon table show NPK?
Not on these eleven listings. The technical tables do not print N, P2O5 or K2O, so the comparison leaves the nutrient line blank. A mixing-ratio field such as 1:0:0 or 4:4:1 is not an analysis. The statutory symbols belong on the pack label, which these Amazon tables are not copying.
Are Bud Candy and Sugar Shot the same kind of fertiliser as Canna Coco?
No. CANNA Coco A and B is a two-part base for coco. Bud Candy at £22.43 and Sugar Shot at £24.36 are carbohydrate additives, and neither Amazon table prints an NPK. Sugar Shot names soil, coco and hydroponics. That tells you which media the listing mentions, not that the bottle replaces A and B.
Does buying the bottle make cultivation lawful?
No. Cultivating cannabis in the United Kingdom requires a Home Office licence under the Misuse of Drugs Act 1971 and the Misuse of Drugs Regulations 2001. A sale on amazon.co.uk does not grant that licence. This guide is a way to read the shelf, not a method of cultivation.
Which listing is the coco A and B set?
There are two. B003VN7272 is £17.56, 4.7 from 1,969 reviews, with a 1 litre volume field. B0090HMR9G is £19.49, 4.0 from 127 reviews, and its liquid-volume field says 2 litres against a 1L title. A UK review on the second listing says the bottle text is French. They are not one offer.

Related pages

Cannabis fertiliser comparison

Coco fertiliser or soil fertiliser

How to read a fertiliser label

Bloom booster or base fertiliser

Best cannabis fertiliser: pick one job, skip the rest

Sources

Public UK and trade sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the eleven amazon.co.uk listings captured on 19 October 2026. There is no laboratory test and no harvest measurement. A Bio name is not an organic certificate. Buying a bottle does not make cannabis cultivation lawful.

  1. Misuse of Drugs Act 1971, section 6 (retrieved 19 October 2026)
  2. Misuse of Drugs Act 1971, Schedule 4 (retrieved 19 October 2026)
  3. Misuse of Drugs Regulations 2001, regulation 12 (retrieved 19 October 2026)
  4. GOV.UK, hemp licensing (retrieved 19 October 2026)
  5. GOV.UK, manufacturing and marketing fertilisers (retrieved 19 October 2026)
  6. Regulation (EC) No 2003/2003, Article 9 (retrieved 19 October 2026)
  7. Fertilisers Regulations 1991, Schedule 2 paragraph 6 (retrieved 19 October 2026)
  8. ASA CAP Code 3.7 (retrieved 19 October 2026)
  9. Greens Horticulture, nutrients for soil, coco and hydro (retrieved 19 October 2026)
  10. GroWell, how to choose nutrients (retrieved 19 October 2026)