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Palm fertiliser buying guide: read your dose first

Updated: October 2026

You have a kentia, a sago, or a windmill palm, and the amazon.co.uk results all mention palms. Some bottles are a specialist concentrate, some spikes are shared with ferns, and one bag was £97.15 on 19 October 2026. This palm fertiliser buying guide is the order we use before the star line: the plant, a dose you can read, the form, the season, then whether the label names magnesium, iron, or manganese. The [Palm fertiliser](/hub/fertiliser-soil-and-bark-mulch/palm-fertiliser) comparison tables the prices. Products Compared did not run a laboratory test. A qualifying purchase can earn a commission at no extra cost to you.

You have a kentia, a sago, or a windmill palm, and the amazon.co.uk results all mention palms. Some bottles are a specialist concentrate, some spikes are shared with ferns, and one bag was £97.15 on 19 October 2026.

Our top picks

COMPO COMPO green plant food 1 litre

Best overall

COMPO COMPO green plant food 1 litre
8.6/10about £26.45
View offer
Growth Technology Palm Focus 100 ml

Alternative

Growth Technology Palm Focus 100 ml
7.1/10about £4.25
View offer
Jobe's Organics Jobe's fern and palm spikes

Best value

Jobe's Organics Jobe's fern and palm spikes
7.9/10about £6.99
View offer
On this page
  1. 1.Start with the plant
  2. 2.Read the dose before the brand
  3. 3.Liquid, spikes, or granules
  4. 4.Season and what the label names

Start with the plant

A sago is a cycad, usually Cycas revoluta, and a kentia is a true palm that lives indoors in a British house. A pack sold for in-ground tropicals is the wrong first shortlist for a parlour palm. Read the sold-for line, not only the word palm in the title. Palm Focus, 100 ml at £4.25 and two litres at £17.76, is named for palms and, on the small bottle, cycads. Jobe's spikes at £6.99 are fern-and-palm packs. COMPO's 1 litre at £26.45 prints 7+3+6 and is still a green-plant food. Hibiscus on a bag, or ferns on a spike box, means a shared formula. That fits if you grow both.

Read the dose before the brand

Palm Focus prints 5 ml in 1 litre, on both Growth Technology listings and on the Palm Centre page. The twin pack is that same rate at £17.76. A field on it reads 200:1. Mix from the 5 ml bullet. UK GROW at £10.99 and £19.99 says mix with water and gives no millilitres. Both listings show 4.0 from 6 and the same image. A field on the 5 litre listing reads 1:1, and the bullets never confirm it. If the bottle in your hand has no rate, leave it. Retailer pages print near 2.1-0.9-3.6, or 4.5:2:3.7 at Ashwood. These listings print no NPK.
COMPO COMPO green plant food 1 litre

Testsieger

COMPO COMPO green plant food 1 litre
8.6/10about £26.45
View offer

Liquid, spikes, or granules

One house palm is a liquid job if you will measure. The 100 ml Palm Focus bottle is the shortlist for that single pot. The twin pack is the shortlist when you will feed more than one container through the season. Spikes suit you if you will not measure. Both Jobe's 30-packs are £6.99, and a spike feeds the roots beside it. COMPO's sticks at £15.78 claim about three months from March to October. Granules belong with in-ground palms. Miracle-Gro at £97.15 for 8 lb names magnesium, iron, and manganese. Eight pounds for one windmill palm is a cupboard problem.

Season and what the label names

A house palm and an outdoor palm do not share one stop date. The RHS indoor line is fortnightly from April to mid-September. Palm Centre says every other watering all year indoors, and March to September outdoors. Hardy Palms says stop outdoor feeding by late August. The steps sit on the how to feed a palm page. Jobe's states 16-2-6 where that figure appears, which is high nitrogen. COMPO's liquid prints 7+3+6. EC fertiliser on that listing is wording under the Fertilising Products Regulations 2020, not a medal. Who should skip each pack is on the best palm fertiliser page.

Common questions

Do I need a palm fertiliser or will a green-plant food do?
A general food can be enough for a mixed windowsill if the listing names palms and prints an analysis, which COMPO's 7+3+6 liquid does at £26.45. It is still sold for green plants, and the opened reviews are mostly not British. A specialist such as Palm Focus is the closer match when the plant is a palm or a cycad and you want a printed 5 ml dose. Either way, match the plant before the star count.
What if the bottle has no mixing instructions?
Stop, and use only a rate printed for that bottle. Palm Focus is 5 ml per litre on the listing and on the Palm Centre page. UK GROW's bullets do not give millilitres, a reviewer reported no instructions, and the 1:1 field is not a verified dilution. A blank bottle is not an invitation to guess.
Is 16-2-6 right for a palm, or is it just high nitrogen?
On the indoor Jobe's bullet, 16-2-6 is what the listing states, and the other Jobe's pack shows 16:2:6 in a field. That is a high first number beside the phosphorus and potassium. It is a fern-and-palm spike formula, not a UK law for every palm. If you wanted magnesium and manganese named on the bag, this is the wrong shortlist.
Why do retailer pages disagree on Palm Focus NPK?
Because they print different analyses, near 2.1-0.9-3.6 on one page and 4.5:2:3.7 at Ashwood, while these amazon.co.uk listings print none. The maker page used here does not close the gap. Mix the 5 ml per litre that the bottle and Palm Centre agree on, and treat the shop NPKs as unsettled.
Is an 8 lb bag sensible for one Trachycarpus?
The Miracle-Gro 8 lb bag at £97.15 names useful traces and claims up to three months, and the reviews among the opened set are American. One windmill palm does not need 3.63 kg on the shelf. A measured liquid, or a small spike pack if you accept the nitrogen tilt, matches a single trunk more closely. The large bag is a different job.
Are the star counts on amazon.co.uk actually UK reviews?
The number is the amazon.co.uk star line. In these listings, Palm Focus and the larger Jobe's pack are UK samples. COMPO sticks are France, Belgium, and Germany. COMPO liquid is mostly outside the UK, with one thin UK line. Espoma and Miracle-Gro are United States texts. A high count from another country is not a British verdict.

Related pages

Palm fertiliser for indoor palms

Palm fertiliser

Best palm fertiliser UK: one pot, spikes, or a skip

How to feed a palm in the UK: the dose and stop date

Palm yellow leaves: fertiliser is often the wrong fix

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 eleven amazon.co.uk listings captured on 19 October 2026. An EC fertiliser line is wording on a listing, not a medal. Review texts from outside the United Kingdom are not UK opinion.

  1. RHS, hardy palms (retrieved 19 October 2026)
  2. RHS, indoor palms (retrieved 19 October 2026)
  3. RHS, chlorosis (retrieved 19 October 2026)
  4. RHS, nutrition and feeding plants (retrieved 19 October 2026)
  5. Hardy Palms, fertilising palm trees (retrieved 19 October 2026)
  6. Palm Centre, mineral deficiencies in hardy palms (retrieved 19 October 2026)
  7. Fertilising Products Regulations 2020 (retrieved 19 October 2026)
  8. RHS, storing and disposing of chemicals (retrieved 19 October 2026)