Independent comparisons. We may earn from shop links. More info

Best olive tree fertiliser if you measure each feed

Updated: October 2026

If your potted olive is starting spring growth and you want one bottle rather than a vague promise, the best olive tree fertiliser in these listings is Growth Technology Olive Focus, with conditions. It is the only one here that pairs a usable 10 ml per litre dose with a large amazon.co.uk sample and UK review comments. That is not a laboratory win, and it does not settle the pack-size clash. Prices and stars are on the [olive tree fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/olive-tree-fertiliser). This page is from Peter F., the DIY and tools editor, in October 2026. If you buy through a link, we may earn a commission at no extra cost to you.

If your potted olive is starting spring growth and you want one bottle rather than a vague promise, the best olive tree fertiliser in these listings is Growth Technology Olive Focus, with conditions.

Our top picks

Generic Devonia olive tree fertiliser sticks

Best overall

Generic Devonia olive tree fertiliser sticks
4.6/10about £7.99
View offer
Janit-X Vitax olive tree liquid feed, 3 x 1 litre

Alternative

Janit-X Vitax olive tree liquid feed, 3 x 1 litre
6.8/10about £25.19
View offer
Growth Technology Olive Focus liquid, Growth Technology

Rank 3

Growth Technology Olive Focus liquid, Growth Technology
8.4/10about £12.48
View offer
On this page
  1. 1.How a top pick was chosen
  2. 2.Olive Focus, with conditions
  3. 3.Who should skip Olive Focus
  4. 4.What the other listings are for

How a top pick was chosen

A credible pick needs an olive on the label, a dose you can follow, a pack you can understand and UK comments about real use. There was no laboratory test. A star line does not prove that one formula sets more fruit. Drainage, light and the roots can matter more than the bottle. Devonia sticks show 4.7 stars, higher than Olive Focus at 4.5, from eight ratings and no review text. Olive Focus has 506 ratings and 50 UK texts. A gap of 0.2 stars does not outweigh that sample, especially where thin listings share one star line across sizes. Water-soluble is not a dose, and 1:249 is awkward with no cap volume. Olive Focus states 10 ml in one litre of clean water and says to alternate it with plain water. The season is in how to feed an olive tree.

Olive Focus, with conditions

Growth Technology Olive Focus is the top pick for a patio, conservatory or greenhouse olive when you will measure. The 10 ml per litre line works with a marked cup, and alternating with plain water cuts the habit of feeding whenever the compost looks dry. Many UK comments describe greener leaves or fresh growth. Those are owner notes, not a trial. Some reviewers said it was too soon to judge, and one was disappointed after about six weeks. A feed cannot clear a blocked hole, frost injury or diseased leaves. The title says 300 ml and the fields say two items and 600 ml. Do not treat about £12.48 as a price per bottle until the offer shows what will arrive.
Generic Devonia olive tree fertiliser sticks

Testsieger

Generic Devonia olive tree fertiliser sticks
4.6/10about £7.99
View offer

Who should skip Olive Focus

Skip it if you will not measure 10 ml. The listing does not state the cap's capacity, so a guessed capful is not the dose. Sticks may suit you if you will not use a jug, with less control, and the Devonia count is unresolved. Skip this offer if a verified pack size is essential, for example several bottles for a community garden, until you know whether about £12.48 is 300 ml or two units totalling 600 ml. Skip fertiliser as the first answer to a waterlogged pot. No product here cures olive scab, root rot or frost damage. The container comes first on olive tree fertiliser for pots.

What the other listings are for

Devonia sticks are the best value here at about £7.99. They are pre-measured, listed for pots and borders, and claimed to last up to 12 weeks. The title says 18 sticks and the file records nine items. Eight ratings and no comments do not show which pack arrived. The Janit-X listing titled as Vitax prints 1:249 and a three-by-one-litre title. Three UK comments mention happier potted olives and secure packing. Seven ratings are a thin base, and the brand, model, part number and volume fields do not line up. It may suit a repeat buyer who knows that offer. It is not a safer general pick than Olive Focus. UK GROW comes in 500 ml, five litres and ten litres, all at 4.2 from nine ratings, with no review text and no dilution on the listing. Cultivers is weaker as a UK recommendation: the title says five litres and an organic olive feed, the volume field says one litre, the bullets mention bonsai, and the comments are marked as reviews from Spain. High-street pellets that were not in this set are not ranked here.

Common questions

Is Olive Focus the best fertiliser for every olive tree?
No. It is the top pick in this set of seven for a pot-grown olive when you will measure 10 ml per litre. A tree in wet compost, a tree you have just repotted, or an established olive in open ground may not need liquid feed at that point.
Does 4.7 stars from eight ratings beat 4.5 from 506?
Not by itself. The 4.7 average is a very small sample and has no saved review comments. The 4.5 average covers 506 ratings, with 50 UK texts that show both greener growth and limits.
Is Devonia the best value if I do not want to measure?
It is the best value here because it is the lowest price in the set and uses pre-measured sticks, at about £7.99. Confirm how many sticks are supplied. The title says 18, and other fields indicate nine.
Can I assume the £12.48 Olive Focus offer contains two bottles?
No. The title says 300 ml, while the item and volume fields point to two units and 600 ml. Check the current amazon.co.uk offer before you calculate a unit price. The shelf price is about £12.48.
Why are the UK GROW cans not top picks?
Their files contain no usable mixing ratio, no saved review text, and the same nine-rating line across 500 ml, five litres and ten litres. Those gaps make a safe dose, and size-specific performance, hard to compare.
Will the top pick cure yellow leaves?
Only if a real nutrient shortage is the cause, and the listing does not diagnose that. Check drainage, winter stress and leaf spots first. Fertiliser will not cure waterlogged roots, frost damage or olive scab.

Related pages

Olive tree fertiliser buying guide for patio olives

Olive tree fertiliser

Olive tree fertiliser for pots before a larger can

How to feed an olive tree through the growing season

Olive tree yellow leaves before you buy fertiliser

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 21 October 2026. A 1:249 or 4:1:7 line is not treated as an NPK. Spanish review texts are not UK trials. No laboratory compared these products.

  1. RHS, How to grow olives (retrieved 21 October 2026)
  2. RHS, How to feed plants (retrieved 21 October 2026)
  3. RHS, Preventing winter damage (retrieved 21 October 2026)
  4. RHS, Growing plants in containers (retrieved 21 October 2026)
  5. Olive Focus maker (retrieved 21 October 2026)
  6. Palm Centre, Olive Focus (retrieved 21 October 2026)
  7. Fertilising Products Regulations 2020 (retrieved 21 October 2026)
  8. Regulation (EU) 2019/1009 Annex III (retrieved 21 October 2026)