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Bloom booster or base fertiliser

Updated: October 2026

You have Advanced Nutrients Big Bud in one amazon.co.uk tab and CANNA Coco A and B in the other, and both pages talk about flowers. Bloom booster or base fertiliser is the split between the bottle that claims to be the main feed and the bottle that is only an extra. This page sorts the eleven liquids in our [cannabis fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/cannabis-fertiliser) by that role. Prices, stars and review counts are from those listings on 19 October 2026. Cultivating cannabis in the United Kingdom needs a Home Office licence, and buying a bottle does not grant one. Medium choice stays on the [coco fertiliser or soil fertiliser](/hub/fertiliser-soil-and-bark-mulch/cannabis-fertiliser/sub/cannabis-fertiliser-coco-or-soil) page.

You have Advanced Nutrients Big Bud in one amazon.co.uk tab and CANNA Coco A and B in the other, and both pages talk about flowers.

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.What a base feed is in this folder
  2. 2.What the boosters add
  3. 3.Sugar and trace bottles
  4. 4.When to buy which

What a base feed is in this folder

A base feed here is a listing that presents itself as the main nutrient, not a spike on top of one. Four ASINs meet that test: two CANNA Coco A and B sets and two single bloom liquids. B003VN7272 is CANNA Coco A and B at £17.56, rated 4.7 from 1,969 reviews, with a 1 litre liquid-volume field. The listing covers growing and flowering on coco. B0090HMR9G is a separate A and B offer at £19.49. Bloom pH Perfect, B00V4QR3MC, is a 500 ml hydroponic bloom liquid at £10.62. The name pH Perfect belongs to this bottle, not to the boosters. CANNA Bio Flores, B00DCX5VOC, is 1 litre at £14.63, with a soil note rather than coco. A booster assumes one of these four is already the feed you have chosen.

What the boosters add

A booster is a flower extra that assumes a base already exists. A review count is not a measured harvest. Big Bud, B004TENZMI, is 250 ml at £12.25, rated 4.5 from 9,337 reviews. It does not say coco and does not print an NPK. Big Bud Coco is two ASINs. B00V4QS74K is £13.42, rated 4.6 from 692 reviews. B07D3ZGPY6 is £12.50 and 4.3 from 65 reviews. Bud Ignitor, B004TEKMYM, is 0.25 litre at £20.64, with no medium and no NPK. It does not replace the coco set or the 500 ml Bloom bottle.
CANNA CANNA Coco A and B 1L set

Testsieger

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

Sugar and trace bottles

Bud Candy, Sugar Shot and Trace Mix are a third job. Bud Candy, B003OTZ2PW, is a 1 litre carbohydrate additive at £22.43, rated 4.7 from 2,844 reviews. There is no NPK, so the star line does not make it a base. Sugar Shot, B0BKWB3FQW, is 1 litre at £24.36, the highest price in the folder, rated 4.4 from 127 reviews. Naming three media does not make a coco base. Trace Mix, B0083G22QS, is a 1 litre supplementary mineral fertiliser at £12.41, rated 4.5 from 53 reviews, listed for a trace-element gap.

When to buy which

Buy the base first. For a coco feed, that is CANNA Coco A and B on B003VN7272 at £17.56, if you can accept a missing nutrient line and French text noted on the B bottle. If you want the cheapest bloom liquid, Bloom pH Perfect at £10.62 is the best value on price and review count. Who should skip each one is on the best cannabis fertiliser page. Buy a booster only after that base is chosen. Leave Bud Candy, Sugar Shot and Trace Mix until a base is in the basket. A carbohydrate bottle does not stand in for A and B. If the first job is still open, use the cannabis fertiliser buying guide.

Common questions

Can I buy only Big Bud?
Big Bud, B004TENZMI, is a 250 ml flower booster at £12.25 with 4.5 from 9,337 amazon.co.uk reviews. It prints no NPK and names no medium. You can buy the bottle on its own. It still does not replace CANNA Coco A and B or Bloom pH Perfect, because a booster is an extra on top of a base.
What is the base feed in this folder?
Four listings claim the main feed. CANNA Coco A and B, B003VN7272, is £17.56 and 4.7 from 1,969 reviews. B0090HMR9G is the other A and B offer at £19.49. Bloom pH Perfect is £10.62 for 500 ml, and CANNA Bio Flores is £14.63 for 1 litre. Boosters, carbohydrate bottles and Trace Mix are not in that group.
How is Bud Candy different from Big Bud?
Bud Candy is a 1 litre carbohydrate additive at £22.43, rated 4.7 from 2,844 reviews. Big Bud is a 250 ml flower booster at £12.25, with no carbohydrate claim and no NPK. Both come after a base. The star line on Bud Candy does not make the two bottles the same job.
Is Bud Ignitor a base?
No. Bud Ignitor, B004TEKMYM, is a 0.25 litre flowering liquid at £20.64, rated 4.6 from 1,307 reviews. It names no medium and prints no NPK. A mixing-ratio field of 1:0:0 is not an analysis. It does not replace the 500 ml Bloom bottle or a CANNA A and B set.
Why must A and B concentrates stay apart?
CANNA's Coco A and B page says the parts are separate because concentrated calcium and phosphate can react if poured together. Keep each concentrate in its own bottle. That is a handling warning, not a dose or a weekly chart. The amazon.co.uk tables still do not print a nutrient analysis.
Does the Amazon file confirm the maker's 0-4-4 figure?
No. The maker's Big Bud Coco page prints NPK 0-4-4. The amazon.co.uk tables for B00V4QS74K and B07D3ZGPY6 do not. Both leave N, P2O5 and K2O blank. Treat 0-4-4 as the maker's figure only, and compare the UK listings on price, reviews and pack size.
Where does Trace Mix sit?
CANNA Trace Mix is a 1 litre trace-element top-up at £12.41, rated 4.5 from 53 reviews. It is not a complete base, and it ranks outside the hydroponic positions of the coco sets. The 1-2 ml/L field on the listing is not a plan for this page. Buy it only when a base is already chosen.

Related pages

Cannabis fertiliser comparison

Coco fertiliser or soil fertiliser

Best cannabis fertiliser

Cannabis fertiliser buying guide

How to read a fertiliser label if the NPK is blank

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)