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Best flower fertiliser by job

Updated: October 2026

Best flower fertiliser is a poor search if you have not named the job. A 1 litre you pour on a windowsill, a concentrate you measure, a granule for a camellia, and a sachet for a jug are different products, and a shared star rating does not make them interchangeable. This page names one listing from the set for each job, and who should leave it on the shelf. Shelf prices recorded on 19 October 2026, and the whole table, are on the [flower fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/flowers-fertiliser). A qualifying purchase can earn us a commission at no extra cost to you.

Best flower fertiliser is a poor search if you have not named the job.

Our top picks

Miracle-Gro Miracle-Gro All Purpose concentrate, 2 x 800 ml

Best overall

Miracle-Gro Miracle-Gro All Purpose concentrate, 2 x 800 ml
7.4/10about £7.98
View offer
Baby Bio Baby Bio Pour & Feed, 1 litre

Best value

Baby Bio Baby Bio Pour & Feed, 1 litre
7.3/10about £5.81
View offer
Floral supplies Oasis Floralife sachets, 10 pack

Alternative

Floral supplies Oasis Floralife sachets, 10 pack
7.4/10about £3.69
View offer
On this page
  1. 1.If you will not measure
  2. 2.If you will mix
  3. 3.If the shrub hates lime
  4. 4.If you only have a vase
  5. 5.Who should skip the rest

If you will not measure

Baby Bio Pour & Feed, 1 litre at £5.81, is the listing for ordinary pots when you will not measure a cap. The item highlight says no dilution is required. It is the best value because that price is the lowest shelf price among packs that tell you how to use them and do not clash on pack size. It is the wrong bottle for a vase and for a camellia. If you are still unsure, start with the flower fertiliser buying guide.

If you will mix

Miracle-Gro All Purpose concentrate, two 800 ml bottles at £7.98, is the listing when you will mix. The amazon.co.uk average is 4.6 from 3,025 reviews, which is why it is the top pick: the score ties another listing, and this one has the larger review count. The mixing-ratio field is blank. The manufacturer label for model 121175 prints half a cap in 1 litre, and a quarter cap for small or young plants. That ratio is not in the amazon bullets. Skip this pack if you will not measure, and skip it for a jug of cut flowers. The dose is on how to feed flowers.
Miracle-Gro Miracle-Gro All Purpose concentrate, 2 x 800 ml

Testsieger

Miracle-Gro Miracle-Gro All Purpose concentrate, 2 x 800 ml
7.4/10about £7.98
View offer

If the shrub hates lime

For azaleas, camellias or rhododendrons, leave both liquids. Westland ericaceous granules are £6.00, with a 3 month slow-release claim and 4.5 from 282 reviews. The title says 900 g, and the item weight is 770 g. The product data does not print the gram rate. Miracle-Gro's coated granules, £8.10 and 4.6 from 785 reviews, name those three shrubs and claim one spring application for the season. The amazon title does not state the pack weight. Skip both for a vase or ordinary bedding. Compost, rainwater and the end of July are on the ericaceous fertiliser page.

If you only have a vase

The listing that states the yield in the bullets is the Oasis Floralife 10-pack at £3.69. Each 4 g sachet makes 0.5 litre. The unit count is 4 g, one sachet, not the pack of ten. Skip every soil feed for this job, including the 8 kg tub. Floralife's 20-pack states 500 ml, but the form field says liquid and a review received powder. The water change is on the cut flower food page.

Who should skip the rest

Miracle-Gro Pour and Feed, two 1 litre bottles at £8.98, has 4.5 from 5,343 reviews, and the spec still does not say whether you dilute it. Skip it when you need the listing itself to answer that question. Topline's 8 kg granules at £23.99 are the wrong buy for a few pots and for any vase. The grams are not printed, and 20:20:20 in the mixing-ratio field is not a declared analysis. One tub arrived pouring granules down a drive.

Common questions

What should I buy for ordinary pots if I will not measure?
Baby Bio Pour & Feed, 1 litre at £5.81. The highlight says no dilution. Skip it if you need the bottle to last as long as a concentrate, or if the plant is an azalea, camellia or rhododendron. The outdoor-plants question on the listing is unanswered, so a bed is a weaker fit than a pot you can pour onto.
What should I buy if I will dilute a concentrate?
Miracle-Gro All Purpose, two 800 ml bottles at £7.98. The bullets say mix with water. The amazon mixing-ratio field is blank; the manufacturer label for model 121175 prints half a cap per litre. Skip it if you will pour from the bottle without measuring.
Which listing is for azaleas, camellias or rhododendrons?
The two granule packs, not the liquids. Westland at £6.00 claims a 3 month release and a manufacturer rate of two doses. Miracle-Gro at £8.10 names those three shrubs and claims one spring application. Skip both for a vase or for ordinary bedding.
Which sachet states 0.5 litre?
The Oasis Floralife 10-pack at £3.69 states one 4 g sachet per 0.5 litre in the bullets. Floralife's 20-pack also states one sachet per 500 ml, with a form field that says liquid. Fleur vital's liquid-volume field says 0.5 litres, and the steps are not in the bullets. A large vase may need two sachets.
Is the highest review count the best flower feed?
No. Miracle-Gro Pour and Feed has 5,343 reviews and no dilution line in the spec. Stars do not say whether the pack is a vase food, a concentrate, or an ericaceous granule. Pick the job, then the listing that states that job.
When is the 8 kg tub the wrong buy?
When you have a few pots, a vase, or a camellia. Topline at £23.99 is an outdoor garden granule with no gram rate in the product data and no declared analysis. It can suit a bed if you can store 8 kg and you will follow the rate printed on the tub you receive.

Related pages

Ericaceous fertiliser

Cut flower food

Flowers fertiliser

Flower fertiliser buying guide for pots, beds and vases

How to feed flowers: the dose, place and stop date

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 ten amazon.co.uk listings captured on 19 October 2026. Scores use the method dated 21 October 2026. This is not a laboratory test. An analysis on a maker label is that label, not a figure the amazon bullets always repeat. The 2026 consultation on UK Fertilising Product Regulations is not law in force.

  1. RHS, fertilisers (retrieved 19 October 2026)
  2. RHS, feeding plants (retrieved 19 October 2026)
  3. RHS, conditioning cut flowers (retrieved 19 October 2026)
  4. RHS, growing camellias (retrieved 19 October 2026)
  5. Fertilisers Regulations 1991, legislation.gov.uk (retrieved 19 October 2026)
  6. GOV.UK, manufacturing and marketing fertilisers (retrieved 19 October 2026)
  7. Miracle-Gro all purpose concentrate label (retrieved 19 October 2026)
  8. Miracle-Gro azalea, camellia and rhododendron label (retrieved 19 October 2026)