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Best bonsai feed for the tree you actually have

Updated: October 2026

BioGold 900 g is 4.6 from 96 reviews. Bonsai Focus is 4.5 from 978. A 1 litre bottle is 5.0 from a single review. The 250 ml listing even calls itself probably the best general-purpose bonsai feed in the world, which is a slogan on the page, not a result. There is no single best bonsai feed in this set, and none of these rows is a laboratory champion. What you can do is match a listing to the tree and the habit you already have. The [bonsai fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/bonsai-fertiliser) holds the full table. A purchase through our links can earn a commission at no extra cost to you.

BioGold 900 g is 4.6 from 96 reviews. Bonsai Focus is 4.5 from 978. A 1 litre bottle is 5.0 from a single review.

Our top picks

Biogold BioGold 900 g

Best overall

Biogold BioGold 900 g
7.6/10about £34.99
View offer
Growth Technology Ltd Bonsai Focus 100 ml

Rank 2

Growth Technology Ltd Bonsai Focus 100 ml
8.4/10about £3.35
View offer
Chrysal Liquid Bonsai Feed 250 ml

Preis-Tipp

Chrysal Liquid Bonsai Feed 250 ml
8.1/10about £9.95
View offer
On this page
  1. 1.There is no single best bonsai fertiliser here
  2. 2.If you will measure a liquid
  3. 3.If you will not mix
  4. 4.What not to treat as a winner

There is no single best bonsai fertiliser here

The trap is treating the highest star, or the roundest 5.0, as the winner. A 4.6 from 96 reviews is a stronger file than a 5.0 from one review, and a 4.5 from 978 reviews is a larger file than either. None of those numbers says the compost in your pot received the right amount of nitrogen. Kew’s public advice is that a special best feed is unnecessary when the ratio is near 5:5:5. Only one liquid in this set prints a full NPK in the bullets, and it is 4-6-6, not 5:5:5. The rest are a form, a dose, and a review pattern. Scores in our table are editorial. They are not a lab score. If you want the checks without a named pick, use the bonsai fertiliser buying guide.

If you will measure a liquid

For one or two trees, and a syringe or a cap you will actually use, Bonsai Focus is the measured first bottle. It is 100 ml at £3.35, listed at 4.5 from 978 reviews. According to the product data, mix 5 ml in 1 litre, from March until August, with an occasional winter feed. It names humic and fulvic acids and seaweed. It does not print an NPK, and it does not answer the indoor question in the bullets. In the Amazon reviews, people often say the bottle looks small until it is diluted. Choose the 250 ml liquid, £9.95 and 4.4 from 885 reviews, when you want 4-6-6 printed and a cap that is meant for measuring. Skip the scraped field that says 1:1. The weekly mixing itself is on liquid vs pellet bonsai fertiliser.
Biogold BioGold 900 g

Testsieger

Biogold BioGold 900 g
7.6/10about £34.99
View offer

If you will not mix

BioGold 900 g, £34.99, is the pellet listing for several trees when you would rather leave pieces on the soil. It is 4.6 from 96 reviews, the highest star row here. The bullets say it resists mould and insects and is shaped so it should not roll. There is no cakes-per-pot figure, so you cannot follow a printed count. The model field says NPK - 5.5 and a scraped field says 5:5:5. Those are not the same statement. In the Amazon reviews, one person dislikes a cat-litter smell when the bag opens. Buy it for a collection, not for a single gift ficus. Naruko, 250 g at £6.99, is 3.9 from 72 reviews, and mould within a day or two is the line that repeats.

What not to treat as a winner

UK GROW’s 1 litre bonsai feed is £11.99 and 5.0 from one review. The bullets say a few drops in water, every variety from juniper to ficus, and a natural defence against disease and pests. None of that is backed by an NPK or a trial on the listing. A 90-day warranty line does not fill the gap. The UKGROW mist, 100 ml at £5.99, has no NPK and no soil dose. Buy it only if you already have a proper feed and you wanted a spray. If you only have one ficus, start with a liquid you can measure.

Common questions

Which listing is the sensible first bottle?
Bonsai Focus, if you will measure 5 ml into a litre and you have one or two trees. It is £3.35, 4.5 from 978 reviews, and the dose is printed. The limit is the missing NPK, and the indoor question on the listing is unanswered. If you want 4-6-6 on the bullet instead, take the 250 ml liquid at £9.95 and ignore the scraped 1:1 field. Neither bottle is a tested champion.
Is BioGold the best because it has 4.6?
It has the highest star row in this set, 4.6 from 96 reviews, and that is a real file. It is also £34.99, with no cakes-per-pot dose and two NPK fields that do not match. It is the pick when you have several trees and you will not mix. It is a poor fit for one small indoor pot.
Why is 5.0 from one review not the top pick?
UK GROW’s litre is 5.0 from one amazon.co.uk review. Focus is 4.5 from 978. A single five-star click cannot show you the range of results, the failures, or the complaint that repeats. The litre also lacks an NPK and a numeric dose. It is not a reason to rank the bottle above a concentrate with a printed ratio and a large file.
Is the 250 ml feed better than Focus because it prints 4-6-6?
It is better specified on nutrients. The bullets say 4-6-6, and Focus does not print an NPK at all. Focus is clearer on the mix: 5 ml per litre, against a 250 ml page whose scraped field says 1:1 and whose bullets point you to the cap. Stay with Focus when the low price and the explicit ratio matter more, and you can live without the three numbers.
Should I buy 500 g or 900 g of BioGold?
Buy 900 g when you have several trees, you accept £34.99, and you have read the smell note and the missing count per pot. Buy 500 g at £19.99 only when half a kilo is enough and you can accept no NPK and a thinner review file. The two ASINs are not the same listing with a different weight sticker.

Related pages

Indoor bonsai fertiliser

Bonsai fertiliser

Best bonsai fertiliser UK: what to check before you buy

How to fertilise a bonsai without drowning the pot

Liquid vs pellet bonsai fertiliser, mould and smell

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 seven amazon.co.uk listings captured on 19 October 2026. Scores are editorial, not a laboratory test. A missing NPK is a gap, not a zero. The scraped 1:1 field is not the dose for the 250 ml liquid.

  1. RHS, bonsai (retrieved 19 October 2026)
  2. RHS, feeding plants (retrieved 19 October 2026)
  3. Federation of British Bonsai Societies, cultivation (retrieved 19 October 2026)
  4. Federation of British Bonsai Societies, the bonsai year (retrieved 19 October 2026)
  5. Kew, top ten bonsai tips (retrieved 19 October 2026)
  6. Growth Technology, safety data sheets (retrieved 19 October 2026)
  7. Growth Technology, indoor bonsai leaflet (retrieved 19 October 2026)
  8. legislation.gov.uk, retained Regulation (EC) No 2003/2003 Article 9 (retrieved 19 October 2026)
  9. legislation.gov.uk, Fertiliser Regulations 2006 (retrieved 19 October 2026)
  10. ASA ruling, The SEER Centre Trust (retrieved 19 October 2026)