The best mediterranean plant foods, compared.
Top pick: Cultivers organic olive and Mediterranean granules, 20 kg Best value: Algoflash Alimed Mediterranean plant fertiliser, 750 ml – Lowest shelf price per 100 ml among the liquids, about £2.37, at about £17.79. Updated October 2026.
Mediterranean plant food is a fertiliser for citrus, olives, figs, oleander and similar plants that usually live in UK pots and come under cover for winter. You tell a suitable pack from the plants named on the label, the form, and whether you can measure a dose. A weekly liquid should state millilitres per litre. A longer-lasting product should state the interval. A mixing ratio of 1:0 is not a dose. A household bottle or a box near a kilogram suits a patio. A 20 kg sack is for many trees or a crop row. Citrus and olives do not share a calendar. Citrus are fed all year: a high-nitrogen summer feed from late March to October, then a more balanced winter feed from November to mid-March, as the Royal Horticultural Society describes it. Olives in pots get a balanced liquid about monthly in the growing season, then you stop. The winter citrus schedule is the wrong plan for a dormant olive. The difference is set out in [how to feed Mediterranean plants](/hub/fertiliser-soil-and-bark-mulch/mediterranean-plant-food/sub/mediterranean-plant-food-how-to-feed).
Mediterranean plant food is a fertiliser for citrus, olives, figs, oleander and similar plants that usually live in UK pots and come under cover for winter.
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Personal buying guide
Question 1 of 2
What are you growing?
Cultivers is a 20 kg sack of microgranules at £56.28, and the bullets state NPK 8-1-5 with 74% organic matter and humic acids. The title says 100% organic and vegan, the release is described as slow, and specific uses say agricultural crops. The saved listing gives no gram rate for one pot, and the mixing-ratio field prints 8:1:5, which repeats that NPK rather than a dilution in water. The star line is 5.0 from two reviews, with no review text in the file, so there is no sentence about a patio lemon to quote. The bullets say the product is harmless to animals, the pet question on the listing is unanswered, and no test is cited. About £0.28 per 100 g is crop-scale arithmetic. For one pot the sack is storage, and the indoor question is unanswered.
Pros
Cons
Best for: Someone feeding olive or Mediterranean plants at crop scale who already has a gram rate from the sack label.
Less suitable: One lemon or one patio olive, and anyone who needs a UK review sentence or an iron analysis.
Specifications
Common questions
What analysis do the bullets give?
They say NPK 8-1-5, 74% organic matter and humic acids. The mixing-ratio field prints 8:1:5, which matches that NPK line. It is not a dilution in water.
Is this a patio bottle?
The title is a 20 kg pack. Item weight is 20 kg. Specific uses say agricultural crops. The saved listing gives no gram rate for one pot.
What do buyers say in the saved listing?
The star line is 5.0 from 2 reviews. The saved listing contains no review text, so there is no praise or complaint to quote.
Across 1,112 amazon.co.uk stars at 4.6, the 50 saved texts are marked Reviewed in Germany, so they are not a United Kingdom sample. Reviewers describe dissolving this 500 ml Substral Naturen liquid in watering water and using it on lemon, olive, oleander and fig. Several say a lemon looked greener, flowered, or held small fruit, and some say a small amount lasted a long time. The same sample includes a manure-like smell that one reviewer called unsuitable indoors, a missing dosing measure, one report of no visible benefit, and one person who used more product per watering than with a previous brand. The listing prints the mixing ratio as 1:0, which does not give millilitres per litre, and the saved listing states no NPK. At £15.88 the title says organic citrus and Mediterranean plant food, and no certifier is named.
Pros
Cons
Best for: A lemon, olive or small mixed patio group when you want a 500 ml liquid and will take the dose from the pack itself.
Less suitable: Anyone who needs millilitres per litre on the amazon.co.uk page, a UK review text, or a winter citrus formula named on the listing.
Specifications
Common questions
Which plants does this Substral bottle name?
The title and the target-species field say citrus and Mediterranean plants. The saved listing does not add a plant-by-plant list. Reviewers mention lemon, olive, oleander and fig. Those lines are reviews, not the label.
How much do you mix?
The mixing-ratio field prints 1:0. That is not a dilution. This saved listing does not give millilitres per litre or a weekly schedule.
Do the saved reviews come from the UK?
The star line is 4.6 from 1,112. The 50 saved texts are marked Reviewed in Germany. They are not United Kingdom reviews.
Algoflash Alimed is a 750 ml liquid at £17.79. The title says Mediterranean plant fertiliser, and the target-species field only says Plants. The saved listing has no bullets, no NPK and no dilution. The star line is 4.6 from 347, and the saved texts are marked Reviewed in France, so they are not a United Kingdom sample. Those reviewers mention olives in pots and in the ground, oleander and bougainvillea, and several mention a dosing cap. Some report new growth or yellow olive leaves improving, more than one saw no change, one called it expensive, and one said it killed two olives. That death report is a single French review, and it still sits against treating the star line as proof the liquid is safe. At about £2.37 per 100 ml it is the lower unit price of the two liquids in this set.
Pros
Cons
Best for: A patio olive or oleander when you want the larger of the two liquids and will read the dose on the label yourself.
Less suitable: Anyone who needs a printed rate, a named citrus winter feed, or a UK review text.
Specifications
Common questions
What plants does the listing name?
The title says Mediterranean plant fertiliser. The target-species field only says Plants. There are no bullets in the saved listing.
Is a dose printed?
No dilution and no NPK are in the saved listing. Reviewers mention a dosing cap. That is not a measured rate.
Where were the saved reviews written?
The star line is 4.6 from 347. The saved texts are marked Reviewed in France. They discuss olives, oleander and bougainvillea. They are not United Kingdom reviews.
This 1.2 kg Substral Naturen pack is the only kept listing whose bullets name lemon, orange, mandarin, oleander, hibiscus, olive and fig, and which claims one application for up to three months. The item-form field says Paste, the bullets say garden or patio, and they mention zeolite plus a formula without animal ingredients. Suitable for organic farming is printed, with no certifier named, and the saved listing gives no NPK and no gram rate. The amazon.co.uk star line is 3.0 from one review, marked Reviewed in Germany: that reviewer called the goods good, the price acceptable, and recommended the product, and stated no complaint. Item weight is listed as 1.3 kg against a 1.2 kg title, and the indoor question is unanswered. At £19.19 it is a multi-month patio pack, and the oleander on the label stays poisonous if eaten.
Pros
Cons
Best for: A small patio group of the plants named on the bullets, if you follow the dosage chart on the pack rather than a rate this listing does not print.
Less suitable: Anyone who needs a weekly winter liquid, a gram rate on the amazon.co.uk page, or a UK review sample larger than one German text.
Specifications
Common questions
Is this a liquid?
The item-form field says Paste. The title says long-term fertiliser, 1.2 kg. The saved listing does not call it granules or a liquid.
Where do the bullets say to use it?
They say low-odour use in the garden or on the patio. The indoor question on the listing is unanswered.
What does the saved review say?
One review, marked Reviewed in Germany, calls the goods good, the price acceptable, and recommends the product. It states no complaint.
Four amazon.co.uk listings were scored from the stored pages and the review texts already on file. Shelf date 21 October 2026. There is no laboratory test. Saved texts marked Reviewed in Germany or Reviewed in France are not treated as a UK sample. Price per 100 ml is outside the score. It decides the best value among liquids only, because a gram of paste or granules is not a millilitre of concentrate. The highest score is the top pick. The weights below sum to 100.
UK buyer evidence
40%Star rating and review text on the amazon.co.uk listing. Texts marked Reviewed in Germany or Reviewed in France are not a UK sample, even when the star line is large. A star line with no review text counts for less.
Followable instruction
35%Whether you can follow a dose from the listing. A claimed interval with no gram rate is weaker than a clear rate. A mixing ratio of 1:0, or a liquid with no dilution and no interval, is not a dose you can follow.
Named plants and place
15%Whether the label names the plants and the place you will use it. Several named species, plus garden or patio, rank higher than a Mediterranean title whose target field only says Plants, or a pack aimed at agricultural crops.
Listing consistency
10%Whether volume, form and title agree. A volume that matches the title ranks higher. A paste form against a kilogram title, or a field that prints NPK where a model number should sit, is a deduction.
Choose the pack by the plants on the label, a dose you can measure, and the calendar for that plant. A citrus winter feed is not an olive feed. A 20 kg sack is not a bottle for one patio lemon. Star lines on the product cards come from the amazon.co.uk listings captured on 21 October 2026. This is not a laboratory test, and a star line is not a count of UK reviews.
Mediterranean plant food is a fertiliser whose label names citrus, olives, figs, oleander or that wider group. In the UK those plants usually live in pots and come under cover for winter. An all-plants feed is a different category. You judge a pack by the plants named, the form, and whether the pack gives a dose you can measure. Three forms turn up on the shelf. A liquid goes into the watering water, and a weekly liquid needs millilitres per litre.
Wet roots, cold and draughts yellow leaves as well as hunger. Drainage comes before another dose of nitrogen.
Citrus are fed all year, with a more balanced feed from November to mid-March. Olives in pots get a balanced liquid in the growing season, then you stop.
The label should name citrus, olive, fig, oleander or that group. A target line that only says Plants is not that list.
The stars are on amazon.co.uk. Saved texts for these listings are marked Reviewed in Germany or Reviewed in France, or there is no review text at all.
Organic on the label is not a reason to use more than the pack says. Extra nitrogen makes soft growth.
Mediterranean plant food should name citrus, olive, fig, oleander or that wider group. A target line that only says Plants is not a species list. A pack whose specific uses say agricultural crops is for a crop row, not one patio pot. An all-purpose feed is a different category, even when the bottle looks specialist. You also need a dose you can measure. A weekly liquid needs millilitres per litre of watering water. A long-term product needs grams for the pot and the interval on the label.
Match the feed to the plant's year. The Royal Horticultural Society feeds citrus all year: a high-nitrogen summer citrus feed from late March to October, then a more balanced winter citrus feed from November to mid-March. Olives in pots get a balanced liquid about monthly while they are growing, then you stop. Putting that winter schedule on a dormant olive is a common mistake. A pack that claims three months is not automatically the winter formula.
Three typical situations, each with a recommendation from this comparison.
You have one to three citrus or olive pots and need a household pack plus a season you can remember. Substral Naturen citrus and Mediterranean liquid, 500 ml, is about £15.88 and names citrus and Mediterranean plants. The mixing-ratio field prints 1:0, so take the dose from the pack, and the saved reviews are marked Reviewed in Germany.
You have several shrubs and need a label that names that group. Oleander stays poisonous if it is eaten. Substral Naturen long-term, 1.2 kg, is about £19.19. The bullets name lemon, orange, mandarin, oleander, hibiscus, olive and fig, with one application claimed for up to three months. There is no gram rate on the listing.
A 20 kg sack suits many trees only if you can store it and the crop wording matches the job. Cultivers organic olive and Mediterranean granules are about £56.28, and the bullets state NPK 8-1-5. Specific uses say agricultural crops, there is no gram rate for one pot, and the star line is 5.0 from two reviews with no text.
The top pick is Substral Naturen long-term citrus and Mediterranean, 1.2 kg, at about £19.19. The bullets name lemon, orange, mandarin, oleander, hibiscus, olive and fig and claim one application for up to three months, which is why it scored highest. It still has no gram rate, and the only saved review is marked Reviewed in Germany. The best value is Algoflash Alimed, 750 ml, at about £17.79, about £2.37 per 100 ml of liquid. That listing has no dilution, and one French-language review says two olives died. The 500 ml liquid prints a mixing ratio of 1:0. The 20 kg sack states NPK 8-1-5 for agricultural crops. Neither badge is a feeding trial or a ranking of every Mediterranean plant food in the UK.
Algoflash Alimed Mediterranean plant fertiliser, 750 ml
Lowest shelf price per 100 ml among the liquids, about £2.37, at about £17.79.
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 four amazon.co.uk listings captured on 21 October 2026. A star line is not a count of UK reviews. Organic wording is quoted from the listing, and no UK organic body is named. Oleander toxicity is the Royal Horticultural Society plant note, not a result of feeding.
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.
