Guano fertiliser buying guide

Updated: October 2026

amazon.co.uk listings that all say guano still do not look like the same product. One is a blister of twenty sticks, one is a litre of liquid, one is a 3.5 kg tub, and one is a 25 kg sack.

amazon.co.uk listings that all say guano still do not look like the same product. One is a blister of twenty sticks, one is a litre of liquid, one is a 3.5 kg tub, and one is a 25 kg sack. GOV.UK treats guano as excrement from bats or wild sea birds; the shop pages use the same word for all four forms. This guano fertiliser buying guide is the check order before you pay: form, whether the label names bat, seabird, or neither, pack size against the ground you have, and what the listing actually prints. Prices are the saved snapshot in GBP. The guano fertiliser comparison holds the product table. Picks sit on the best guano fertiliser page.

Our top picks

Badge	Product	Form	Stated source	Pack size	Note	Price	Offer
Best overall	Guanokalong Guanokalong bat guano, 3 kg	Powder or granules	Bat	3 kg	10.0	about £29.96	View offer
Alternative	COMPO COMPO palm sticks with guano, 30	Sticks	Seabird	30 sticks	9.0	about £15.78	View offer
Best value	Flower Flower guano sticks, 20	Sticks	Not stated	20 sticks	8.0	about £5.97	View offer

Best overall

Guanokalong Guanokalong bat guano, 3 kg

10.0/10about £29.96

View offer

Alternative

COMPO COMPO palm sticks with guano, 30

9.0/10about £15.78

View offer

Best value

Flower Flower guano sticks, 20

8.0/10about £5.97

View offer

On this page

1.Start with the form you will actually use
2.Read whether the label says bat, seabird, or neither
3.Match the pack to the area, then read the analysis line
4.Prefer a UK review text over a large star count
5.Stop on the first check that fails

Start with the form you will actually use

Decide whether you will mix a powder, insert a stick, pour a liquid, or open a sack. Powder or granules suit a top-dress, a tea, or a bed. Sticks suit a three-month insert: COMPO’s thirty name palms, ferns, and pond plants, and Flower’s twenty name flowers. According to the product data, Fertiberia’s 1 L is about £8.49 and prints 1:3 without saying which part is water. CULTIVERS at 25 kg, about £50.31, only makes sense with a plot and dry storage.

Read whether the label says bat, seabird, or neither

On these listings the animal is not always written down. Both VitaLink tubs and Guanokalong say bat. Guanokalong’s title says granular and the item-form line says powder, and the product data does not settle that. COMPO is the only pack that says seabird. Flower, both CULTIVERS sizes, and Fertiberia say guano and name no animal. A stick with guano is not a tub of bat powder. If the listing is silent, do not guess the animal from a review or a shop blend. Import rules and roost law are on the bat or seabird guano page.

Testsieger

Guanokalong Guanokalong bat guano, 3 kg

10.0/10about £29.96

View offer

Match the pack to the area, then read the analysis line

Flower’s 2 kg granules print 2 kg = 40 m² for that listing only, not for VitaLink or the sack. COMPO puts the stick count on the pack, 5–6 cm from the stem. Flower’s twenty sticks have no dose. A 700 g VitaLink tub is a different ASIN. Flower 2 kg prints 3-1.5-1.5. CULTIVERS claims a high NPK and prints no numbers. In the Amazon reviews, one UK text writes 3-10-1 for VitaLink. That is a review. Ignore 1:0:0. Crop names are on the guano fertiliser for vegetables page.

Prefer a UK review text over a large star count

A large star count is not United Kingdom opinion. COMPO’s 2,853 and Flower’s 106 have saved texts from outside the UK, as do both CULTIVERS packs. Fertiberia has no star line. VitaLink B01ARR7GVG is 4.6 from 517 with UK texts, which still does not make a tub the right buy for a palm stick. Guanokalong is 5.0 from 3. The dearer VitaLink listing is 5.0 from 2 with no review text.

Stop on the first check that fails

When a check fails, stop on that check. A pot that needs a stick fails the tub. A bed that needs 25 kg fails the blister. A buyer who needs the animal named fails every listing that only says guano. Form, then the animal on the label, then pack size against the ground you have, then the analysis the listing actually prints, then where the reviews were written.

Common questions

Should I buy powder, granules, sticks, a liquid, or a 25 kg sack?

Buy the form you will actually use. Powder or granules if you will mix or make a tea. Sticks if you want a three-month insert for a palm or a flower pot. Liquid only if you accept Fertiberia’s thin 1 L listing. A 25 kg sack only if you have a plot and dry storage. The comparison table shows each pack’s form in one column.

Does the label have to say bat or seabird?

It does not have to, and five listings in this set do not. If you need the animal named, choose VitaLink or Guanokalong for bat, or COMPO for seabird. If the pack only says guano, the source is unknown. Do not infer the animal from a review written in Spain or from a shop blend that is not in this set.

How do I match pack size to a pot, a palm, or a bed?

Use the claim printed on that pack. Flower 2 kg states 40 m². COMPO is thirty sticks with the number on the blister. The tubs are 3 to 3.5 kg. CULTIVERS is 1 kg or 25 kg. Flower’s twenty sticks print no dose. A 700 g VitaLink tub is a different ASIN and is not in this comparison.

What does a missing NPK, or a mixing field of 1:0:0, mean?

It means the listing has not given you an analysis. 1:0:0 on the Flower files is not a dose. Fertiberia’s 1:3 does not say which part is water. Shop NPK figures for Guanokalong or VitaLink stay on those shop pages. The pack in your hand is the one that counts.

Is 100% organic a certification?

Not on these files. The word appears without a named control body. Regulation (EC) No 889/2008 Annex I lists Guano as published; that list is not a Soil Association certificate for any ASIN here.

Can I treat a large star count as United Kingdom opinion?

No. COMPO’s 2,853 reviews and Flower’s 106 are large counts whose saved texts are not from the UK. Prefer a review marked as written in the United Kingdom. In this set that sample sits on VitaLink B01ARR7GVG.

When is a 25 kg sack the wrong pack?

When you garden in pots, when you have nowhere dry to store a sack, or when you need the animal or a numeric NPK printed on the UK listing. About £2/kg is division of the snapshot, not a reason to buy bulk for a windowsill.

How to use guano fertiliser