The best nitrogen fertilisers, compared.
Top pick: VegAzoto nitrogen liquid, 5 litres Best value: Bottos Sprint N, 2 kg – Lower lawn price with a stated cover, about £13.87 for 80 square metres, and the largest review sample, with a title that disagrees with the bullets. Updated October 2026.
A nitrogen fertiliser is a feed sold for leaf and stem growth. On a UK label that job is the first figure in the NPK line. You buy a nitrogen fertiliser for a pale lawn in spring, for leafy vegetables and herbs, or as the vegetative bottle in a hydroponic or soil-drench routine. A suitable pack shows a printed analysis, a dose you can measure, and a season that matches the plant. Grams per square metre suit granules. Millilitres per litre suit a liquid. A high first number is the wrong tool for fruit that needs potassium, and a mild grow liquid is the wrong tool for a large lawn. The Royal Horticultural Society says most lawns grow without feed, that a spring lawn fertiliser is high in nitrogen and goes on in mid-spring, usually late March to April, and that you should not push lawn nitrogen beyond August. What must be on the label before the price matters is set out in the [nitrogen fertiliser buying guide](/hub/fertiliser-soil-and-bark-mulch/nitrogen-fertiliser/sub/nitrogen-fertiliser-buying-guide).
A nitrogen fertiliser is a feed sold for leaf and stem growth. On a UK label that job is the first figure in the NPK line.
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Personal buying guide
Question 1 of 2
What are you feeding?
The 5 litre VegAzoto pack is about £29.99 and repeats the 300–500 g per 100 litres line, still without an NPK. The title says 5 kg, the unit count is 5,000 ml, and the item weight is 6 kg, so the pack size is not a single figure. The listing adds that the liquid is viscous and soluble, and it names citrus as well as vegetables, fruit and ornamentals. The star line is 5.0 from one review with no text, so the stars alone would look perfect and still tell you nothing. Natural origin on the sister listing is not an organic certification, and this listing does not add one. It is the larger bottle of an unquantified plant-origin feed, not a better-documented one than the 1 litre pack.
Pros
Cons
Best for: Someone already weighing the 1 litre product who wants a larger can and will keep using grams.
Less suitable: A first buy where you need a nitrogen percentage, or any lawn.
Specifications
Common questions
Is the 5 litre pack the same dose as the 1 litre pack?
Both listings print 300–500 g per 100 litres. This listing adds that the liquid is viscous and soluble, and names citrus as well as vegetables, fruit and ornamentals. It does not print an NPK.
Why do the title and the unit count disagree?
The title says 5 kg. The unit count is 5000 ml and the liquid-volume field is 5 litres. The item weight is 6 kg. The listing does not explain the gap.
What do the reviews say?
The star line is 5.0 from 1 review. There is no review text, so there is no praise or complaint to quote.
Hesi TNT Complex, 500 ml, prints N P K 3-2-3 on the model line and costs about £14.28. That is a mild, slightly nitrogen-led grow feed, not a 27-0-14 lawn granule, and the amazon.co.uk fields do not give a dose. The maker’s own page, which is separate from this listing, states 50 ml per 10 litres for soil and coco. One review says 2 ml per litre when watering and that this dose did not overfeed; that sentence is a review, not the label. The star line is 4.6 from 34 reviews. The only United Kingdom text says the price is good and names no plant. Six other saved texts are from Germany and talk about even growth, with one calling the pack expensive. It is the only bottle in this set with a printed analysis, and it is the wrong tool for an 80 square metre lawn.
Pros
Cons
Best for: Soil or coco growing when you want a printed 3-2-3 and will take the dose from the pack in your hand.
Less suitable: An 80 m² lawn, and a hydroponic setup that expected a dose on the amazon.co.uk page.
Specifications
Common questions
What analysis does the listing print?
The item model number is N P K 3-2-3. There is no further nitrogen percentage. Questions on the listing about ingredients, and whether it suits all plants, are unanswered.
What dose appears on the listing?
The listing fields do not give a dose. One review says 2 ml per litre when watering, and that this dose did not overfeed. That is a review, not the label. The maker’s page, separate from this listing, states 50 ml per 10 litres for soil and coco.
What does the UK review say?
The only United Kingdom text says you need this and that the price is good. It does not name a plant or a result. Six other texts are from Germany and talk about even growth and, in one case, the pack being expensive.
At about £13.87 the 2 kg Bottos Sprint N pack is the lower shelf price for a lawn granule that states 2 kg per 80 square metres. The title and the model-number field print 27-5-15 while the bullets print SPRINT N 27-0-14, with 52% of the nitrogen from Polyon, so those two lines are not one analysis. The star line is 4.5 from 644 reviews, the largest sample in this set, and the saved texts are tagged Italy. Reviewers often describe greener turf within about a week to 20 days. Others report burnt patches after uneven spreading or warm weather without watering in, and one says the granules had not dissolved after a week of rain. The bullets also name February to May and August to October, which is not an RHS licence to feed a lawn in October. It is the best value lawn bag if you read the tub you receive and refuse to average the two printed figures.
Pros
Cons
Best for: A smaller lawn in spring, if you will check which NPK is printed on the tub rather than averaging the listing.
Less suitable: A buyer who needs one agreed analysis, vegetables, or an autumn lawn feed.
Specifications
Common questions
What NPK does this 2 kg listing print?
The title and the model-number field print 27-5-15. The bullets print SPRINT N 27-0-14, with 52% of the nitrogen from Polyon. The listing does not say which figure is on the tub.
How much lawn does the listing say 2 kg covers?
The bullets say a 2 kg dose per 80 square metres, and a 60–90 day release. They name February to May and August to October. They do not say whether that is one application or a season total.
What do the saved reviews say about scorch?
The texts are from Italy. Several describe greener turf within about a week to 20 days. Others say uneven spreading, or use in warm weather without watering in, left burnt patches. One says the granules had not dissolved after a week of rain.
The 4 kg Bottos Sprint N listing is the lawn granule here whose model number and bullets both print 27-0-14, with 4 kg stated for 160 square metres. At about £29.01 on 19 October 2026 it is the dearer of the two Bottos packs, sold as 2 × 2 kg, and the title also claims VF nitrile gloves. Across 77 amazon.co.uk reviews the line is 4.5, though the saved texts are tagged Italy, so they are not evidence of a UK spring. Several describe thicker green grass within a few days to two weeks. One review says the lawn burnt in many places even though the reviewer used less than their own recommended dose, and another says the gloves were not in the parcel. The bullets claim a 60–90 day release and name months through October; that curve was not measured, and those later months clash with RHS advice not to push lawn nitrogen beyond August. It is the top pick when you want one analysis on the listing, and a poor match for tomatoes or for an autumn feed.
Pros
Cons
Best for: A lawn you will spread in spring, when you want the listing to agree with itself on 27-0-14.
Less suitable: Tomatoes, a wildflower lawn, feeding after August, and anyone who needs a UK review sample.
Specifications
Common questions
Is this the same analysis as the 2 kg Bottos listing?
This listing’s model number and bullets both print 27-0-14. The 2 kg listing’s title prints 27-5-15 while its bullets print 27-0-14. The listing does not explain the difference.
Are the gloves in the box?
The title says the kit includes VF nitrile/nylon gloves. One saved review says the gloves were not in the parcel. There is no contents list that confirms either way.
Did any saved review report burning?
Yes. One review says the lawn burnt in many places even though the reviewer used less than the recommended dose. Other texts describe thicker green grass within a few days to two weeks. The saved texts are tagged Italy.
UK Grow Nitrogen Plus is a 500 ml liquid at about £10.99 whose title names hydroponics and soil. The listing prints no nitrogen percentage and no dilution, so the name is doing the work the label should do. The target-species line names canna plants of all varieties and fruiting crops, and the bullets talk about macro and micronutrients from seedlings to flowering without an NPK. The star line is 3.9 from 3 reviews and there is no review text, so there is nothing to quote about growth or scorch. Best Sellers Rank 204 in Hydroponic Nutrients and Additives is a catalogue position, not a nutrient figure. At this price it is the cheapest bottle in the set and still too thin to measure as a nitrogen fertiliser.
Pros
Cons
Best for: Only a buyer who already holds a dose sheet from the maker and needs this 500 ml size.
Less suitable: Anyone choosing a nitrogen percentage, or a dose, from the amazon.co.uk listing alone.
Specifications
Common questions
How much nitrogen is in Nitrogen Plus?
The listing does not say. The title is Nitrogen Plus. The bullets talk about macro and micronutrients and do not print an NPK or a percentage.
What plants does the listing name?
The target-species line says canna plants of all varieties and fruiting crops. The bullets say hydroponic systems and soil, from seedlings to flowering. Indoor use is asked and not answered.
Is there a dose?
No dilution rate is on the listing. The star line is 3.9 from 3 reviews and there is no review text.
The 1 litre VegAzoto liquid, sold under McMillan, is about £18.99 and describes a plant-origin nitrogen and potassium feed with betaine, for vegetables, fruit and ornamentals. It does not print percentages, so nitrogen here is a word rather than an analysis. The dose line is 300–500 g per 100 litres. The product is sold as 1 litre with an item weight of 1.5 kg, and the listing does not convert those grams into millilitres. Natural origin is not an organic certification. There is no customer-review line, so there is no praise or complaint to weigh. The target list also names lawn, roses and indoor plants, which is a wide claim for a bottle with no NPK. You can scale the gram dose only if you weigh the liquid. You cannot rank it against a 27-0-14 granule.
Pros
Cons
Best for: Leafy crops or pots, if you will weigh 30–50 g into a 10 litre can and accept an unknown percentage.
Less suitable: A lawn that needs a nitrogen figure, and anyone who wanted a certified organic feed.
Specifications
Common questions
Does the listing give an NPK ratio?
No. The bullets say a liquid nitrogen fertiliser of plant origin, with nitrogen and potassium, plus betaine. They do not print percentages.
What dose is printed?
Dilute 300–500 g in 100 litres of water. The product is a liquid sold as 1 litre with an item weight of 1.5 kg. The listing does not convert grams into millilitres.
Does the listing say it is for indoor plants?
The title names indoor plants and terraces. Indoor is also on the target-species list, with lawn, roses, peppers and leafy vegetables. There is no review text.
Vitax lists nine 500 g units of a soluble high-nitrogen feed at about £59.41. The title is the only nitrogen claim on the listing. There is no NPK, no dilution, no star line and no review text. The use bullet is strong leaf growth on ornamental foliage plants, vegetables and herbs, which at least names a job, though it does not say how much powder goes in the can. A further bullet says the picture is illustrative and the item sent may differ after a manufacturer rebrand, so the tub you imagine may not be the tub that arrives. At this price, with nothing to measure, it is the thinnest listing in the set for comparing nitrogen fertilisers. A soluble powder can suit pots when the label prints a rate. This page does not.
Pros
Cons
Best for: Only if the tub that arrives prints a dilution the listing left out.
Less suitable: Anyone buying from the amazon.co.uk text alone, and any lawn that needs a weighed granule rate.
Specifications
Common questions
What analysis does this Vitax listing print?
None. The title says soluble high nitrogen feed, 500 g, times nine. The only use bullet is strong leaf growth on ornamental foliage plants, vegetables and herbs.
How do you mix it?
The listing does not give a dilution. It says the image is illustrative and that the item sent may differ because of manufacturer rebranding.
Is there a star rating?
No customer-review line and no review text are on the listing. The price printed there is about £59.41.
Seven amazon.co.uk listings were scored from the stored pages dated 19 October 2026. There is no laboratory test. Label agreement is worth up to 45 points: a printed nitrogen figure and a dose with units score high, a title that disagrees with the bullets is marked down, and a missing percentage or a missing dose scores low. Review evidence is worth up to 30, with a deduction when the saved texts are not from the United Kingdom or when there is no text. One review cannot carry the score. Value is worth up to 25: shelf price against what the listing actually specifies. A low price with no analysis is not value. The highest score is the top pick. The best value is the lower-priced lawn granule with a stated cover, and it does not also take the top score. The weights below sum to 100.
Label
45%A printed nitrogen figure and a dose with units score high. A title that disagrees with the bullets is marked down. A missing percentage or a missing dose scores low. The 4 kg Bottos listing agrees with itself on 27-0-14. The 2 kg title and bullets do not.
Review evidence
30%Star rating on amazon.co.uk, then the size of that review file. Texts tagged outside the United Kingdom, or a file with no text, are a deduction. One review cannot carry the score. The 2 kg Bottos file is 4.5 from 644 reviews and the saved texts are tagged Italy.
Value
25%Shelf price on 19 October 2026 against what the listing actually specifies. A low price with no analysis is not value. The 2 kg Bottos pack is about £13.87 with a stated cover. UK Grow Nitrogen Plus is cheaper and prints no percentage.
Buy the job before you buy the star line. A lawn granule, a crop liquid and a hydroponic bottle are not one list. Prices below are amazon.co.uk shelf prices on 19 October 2026. This is not a laboratory test.
A nitrogen fertiliser is a feed sold for leaf and stem growth. On a UK label that job is the first figure in the NPK line. You might want it for a pale lawn in spring, for leafy vegetables and herbs, or as the vegetative bottle in a hydroponic or soil-drench routine. Quality is a printed analysis, a dose you can measure, and a season that matches the plant. A star row does not replace those three checks. Straight high-nitrogen fertilisers supply nitrogen and little else.
Potassium can lead, or the percentage can be missing. A 27-0-14 lawn granule and a 3-2-3 grow liquid are different jobs. Read the first figure and the plant, not the product name.
The 2 kg Bottos title prints 27-5-15 and the bullets print 27-0-14. Those lines are not one analysis. Read the tub. Do not merge 25 g per square metre from the cover line with a review that says 30–35 g.
The Royal Horticultural Society says not to push lawn nitrogen beyond August. September and October on a Bottos bullet do not override that. Autumn is a different, lower-nitrogen feed.
Name the job first. A lawn, a leafy crop, fruit and a hydroponic bottle are not one ladder. A 27-0-14 turf granule is the wrong tool for a tomato. A 3-2-3 grow liquid is the wrong tool for a large lawn. Bottos Sprint N is the lawn granule here. The 4 kg listing’s model number and bullets both print 27-0-14. The 2 kg title prints 27-5-15 while the bullets print 27-0-14, so those two lines are not one analysis. Read the tub you receive. Hesi TNT Complex prints N P K 3-2-3 on the model line.
A dose needs units. Grams per square metre suit granules. Millilitres per litre suit liquids. Bottos states 2 kg per 80 square metres and 4 kg per 160 square metres. That cover implies 25 g per square metre. One review says 30–35 g per square metre. Those are not the same instruction. VegAzoto prints 300–500 g per 100 litres on a liquid sold by the litre, and the listing does not convert grams into millilitres. Weigh it. Do not guess a watering can.
Three typical situations, each with a recommendation from this comparison.
You want a denser green sward in spring and you can weigh a granule rate. Bottos Sprint N 4 kg is the top pick at about £29.01, with the model and the bullets both on 27-0-14 and 4 kg stated for 160 square metres. amazon.co.uk shows 4.5 from 77 reviews, and the saved texts are tagged Italy. One review reports burning.
You grow leafy crops or pots and you can scale a dilution. VegAzoto 1 litre is about £18.99 and prints 300–500 g per 100 litres, with nitrogen and potassium named and no percentages. There is no review line. Natural origin is not an organic certification. Weigh the liquid rather than guessing a watering can.
You want a grow liquid with a printed analysis, and you will take the dose from the pack in your hand. Hesi TNT Complex 500 ml prints N P K 3-2-3 at about £14.28, with 4.6 from 34 reviews. The amazon.co.uk fields do not give a dose. UK Grow Nitrogen Plus is cheaper and prints no percentage. Neither bottle is an 80 square metre lawn feed.
The top pick for a spring lawn is Bottos Sprint N 4 kg at about £29.01. The model number and the bullets both print 27-0-14, and 4 kg is stated for 160 square metres. amazon.co.uk shows 4.5 from 77 reviews, with the saved texts tagged Italy. The best value is Bottos Sprint N 2 kg at about £13.87, stated for 80 square metres, with 4.5 from 644 reviews. Its title prints 27-5-15 and its bullets print 27-0-14, so those lines are not one analysis. Hesi TNT Complex 500 ml is the only bottle here with a printed 3-2-3, and the listing gives no dose. VegAzoto prints a gram dilution and no percentages. UK Grow Nitrogen Plus and the Vitax multipack do not print an analysis. None of these scores is a laboratory test.
Bottos Sprint N, 2 kg
Lower lawn price with a stated cover, about £13.87 for 80 square metres, and the largest review sample, with a title that disagrees with the bullets.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK 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. A 60–90 day release claim was not measured. These listings do not name ammonium nitrate. A domestic lawn is outside the English nitrate vulnerable zone closed period.
Expert source (DIY & tools): Lee Burkhill (Garden Ninja) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the listings. This is not a laboratory test.
