Best granular plant food UK for plots, pots and shrubs
Updated: October 2026
A single best granular plant food UK crown across Growmore, coated season feeds, rose cartons and ericaceous jars answers the wrong question. Best here means best for a named job: a mixed outdoor plot, a once-in-spring pot feed, acid-loving shrubs, roses, or organic fruit and veg. Prices, stars and the eight listings sit on the [plant granules comparison](/hub/fertiliser-soil-and-bark-mulch/plant-granules). This page is from Peter F., the DIY and tools editor, on 21 October 2026. Those listings and public UK sources were read for this page. There was no laboratory test. A qualifying purchase can earn a commission at no extra cost to you.
A single best granular plant food UK crown across Growmore, coated season feeds, rose cartons and ericaceous jars answers the wrong question.
A single best granular plant food UK crown across Growmore, coated season feeds, rose cartons and ericaceous jars answers the wrong question. Best here means best for a named job: a mixed outdoor plot, a once-in-spring pot feed, acid-loving shrubs, roses, or organic fruit and veg. Prices, stars and the eight listings sit on the plant granules comparison. This page is from Peter F., the DIY and tools editor, on 21 October 2026. Those listings and public UK sources were read for this page. There was no laboratory test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Job | Release | Pack | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Miracle-Gro Miracle-Gro rose and shrub plant food 3 kg carton | Roses and shrubs | Up to 3 months | 3 kg carton | 9.2 | about £9.99 | View offer |
 Miracle-Gro Miracle-Gro Continuous Release All Purpose, 900 g (pack of 2) | Once in spring | Season coating | 900 g x 2 | 9.2 | about £11.94 | View offer | |
| Alternative |  Topline Topline Growmore plant-feed granules 8 kg | Mixed outdoor plot | Every 4–6 weeks | 8 kg | 9.0 | about £23.99 | View offer |
On this page
Best for a mixed outdoor plot
If you will walk a mixed garden from February to October and feed flowers, vegetables, fruit trees and shrubs every four to six weeks, the listing is Topline’s 8 kg tub at about £23.99. Water before and after in dry weather. That is a habit, not a coating.
Skip it for two baskets, if you need an NPK you can trust from the Amazon fields, or for rhododendrons. The mixing field prints 20:20:20 while a review says 7-7-7, so the field is not the analysis. Westland’s Growmore page says that habit is not for ericaceous plants. Choose the form first on the plant granules buying guide. The 8 kg pack is the plot pick because of the interval and the plant list, not because it is the heaviest.
Best if you feed once in spring
If you pot baskets once in spring and then leave them, the listing is Miracle-Gro Continuous Release, two 900 g packs at about £11.94. It is the top pick: 4.6 from 2,641 reviews, and a season-long coating claim. Reviewers mix it into compost. The item-form field says powder. The included-components line says controlled-release plant food. Expect prills.
Westland Boost at about £11.64 is the 2 kg alternative on the same calendar. The duration bullet writes 6-moth. Brittle tubs that arrive split are the repeated complaint. Skip both coated packs if you want a monthly Growmore, or if the only plants are ericaceous shrubs. Topline’s 2 kg six-month tub at about £17.99 costs more than Boost for the same printed weight, at 4.3 from 71 reviews, and four of eleven UK reviews mention a split tub.
Best for acid-loving shrubs, roses, or organic fruit and veg
Acid-loving shrubs need Westland’s ericaceous jar at about £6.00 or Miracle-Gro’s azalea, camellia and rhododendron pack at about £8.10, not the plot Growmore. Westland claims three months. Miracle-Gro claims one spring application. Two Westland reviews describe dead plants after the granules dissolved at once. The soil job is on ericaceous plant food granules. Skip both if you are feeding cabbages.
For roses, the 3 kg carton at about £9.99 is the best value, with a twice-a-season instruction at first buds and the second flush. Reviews include a pot rose that died after a month. For outdoor fruit and vegetables, Performance Organics is 1 kg at about £7.99. The mixing field 1:0:0 is not a rate. Granules left on compost can smell and mould. Skip it for a small indoor room.
Skip list
Skip clay media, Seramis-type granules, cat-deterrent scatter, foliar tablets and slug-barrier seaweed. A badge does not change the plant group. The top pick is not a blueberry feed, and the rose carton is not a vegetable-plot Growmore. Skip Topline’s 2 kg six-month tub in most baskets, and skip indoor use of the 8 kg Growmore. A split tub is a delivery fault, not proof the granules fail in soil. If the tub is already in the shed, how to apply plant food granules covers the handful and the calendar.
Common questions
What is the best all-purpose granule in this comparison?
For a mixed outdoor plot that you will feed every four to six weeks, Topline’s 8 kg Growmore. For pots and baskets that you will feed once in spring, Miracle-Gro’s twin continuous-release pack. Those are different jobs. There is no single all-purpose winner across both habits in these listings.
What is the best value per kilogramme?
The 3 kg Miracle-Gro rose and shrub carton at about £9.99 is the best value in this comparison, which is why it carries that badge. The badge only holds if roses and shrubs were the job. An 8 kg Growmore at about £23.99 can still be the plot buy because you are buying interval feed, not a rose carton. On title weight the 8 kg tub is about £3.00 per kilogramme and the rose carton about £3.33.
What should I buy for hanging baskets?
Miracle-Gro’s twin continuous-release pack at about £11.94, or Westland Boost 2 kg at about £11.64 if you want one tub. Mix at potting or scatter once in spring. Do not open the 8 kg Growmore for two baskets.
What should I buy for rhododendrons?
Westland’s ericaceous jar at about £6.00 or Miracle-Gro’s azalea, camellia and rhododendron pack at about £8.10. Do not use the Topline Growmore or the all-purpose coated pack as the named feed. Check ericaceous compost and rainwater as well.
Is the 8 kg Growmore best because it is biggest?
No. It is the plot pick because of the February to October interval and the mixed-plant list. Biggest is a storage problem on a balcony. A 900 g ericaceous jar is the better buy for two camellias.
Why does the 2 kg Topline six-month tub cost more than Westland Boost 2 kg?
The listing prices are about £17.99 against about £11.64 for the same printed weight. Topline also has the thinner sample and the heavier split-tub pattern in the UK reviews. Price is not evidence it lasts longer.
Should I skip a listing with a split-tub review pattern?
If you need the pack to arrive as a sealed rate, yes, or at least open it over a tray. Westland Boost and both Topline tubs show that pattern in the UK reviews. A split tub is a delivery fault, not proof the granules fail in soil.
Related pages
Sources
Sources from the research digest; data on file 21 October 2026.
- Royal Horticultural Society, Fertilisers: types and uses (retrieved 21 October 2026)
- GOV.UK, Manufacturing and marketing fertilisers (retrieved 21 October 2026)
- The Fertilisers Regulations 1991, Schedule 2 (retrieved 21 October 2026)
- Westland Growmore product page (retrieved 21 October 2026)
- Westland Ericaceous granules (retrieved 21 October 2026)
- Love The Garden / Miracle-Gro, How fertilisers work (retrieved 21 October 2026)
- Miracle-Gro All Purpose Continuous Release pack label (PDF) (retrieved 21 October 2026)