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Rose compost buying guide: job, peat, feed, litres

Updated: October 2026

You have a bare-root rose on the path, or a patio pot that still holds last year's mix, and every search result says roses. This rose compost buying guide is the order to use before you add a bag to the basket: the job first, then the peat wording, then the printed feed window, then the litres you can lift. Price per litre comes last. The five bags on the [roses compost comparison](/hub/fertiliser-soil-and-bark-mulch/roses-compost) are the worked example, with amazon.co.uk prices in pounds. This page does not rank them. A qualifying purchase through a link can earn a commission at no extra cost to you.

You have a bare-root rose on the path, or a patio pot that still holds last year's mix, and every search result says roses.

Our top picks

Miracle-Gro Miracle-Gro peat-free rose, tree and shrub 2 × 40 L

Best overall

Miracle-Gro Miracle-Gro peat-free rose, tree and shrub 2 × 40 L
8.4/10about £25.46
View offer
Carbeth Plants Carbeth rose, tree and shrub compost 65 L

Best value

Carbeth Plants Carbeth rose, tree and shrub compost 65 L
7.6/10about £18.99
View offer
Sylvagrow Melcourt Sylvagrow rose, tree and shrub 40 L

Alternative

Sylvagrow Melcourt Sylvagrow rose, tree and shrub 40 L
6.6/10about £17.99
View offer
On this page
  1. 1.Start with the job
  2. 2.Read peat-free, not the mood words
  3. 3.Feed window as printed
  4. 4.Litres, lift, and pence per litre

Start with the job

Rose, tree and shrub compost is a woody-plant planting mix. Specialist rose planting mix is the same job with a rose name and, on the Indigo 10 litre listing, sulphur and zinc. Neither bag is multi-purpose, ericaceous, or a scoop from a heap. Beds want a mix you blend into the soil you already have. Melcourt says 1 part compost to 3 or 4 parts back-fill, not a neat plug in clay. A 40–65 litre sack is the usual size. Pots want a bag that states containers, or peat-free John Innes No. 3, the RHS container default. Carbeth and both Indigo listings name pots or containers. Miracle-Gro leaves container use unanswered. Sylvagrow is for planting into soil.

Read peat-free, not the mood words

Peat-free has to be printed. The RHS says organic or environmentally friendly does not stand in. Eco-friendly on the Indigo 10 litre bullet sits next to a real peat-free line. Organic is unanswered on the Indigo 46 litre listing. All five print peat-free: Miracle-Gro on the title, the item type and a bullet; Carbeth on the highlight only; Sylvagrow as 100% peat-free; both Indigo bags on the title. Defra announced an England amateur peat ban in August 2022. It was not an Act in October 2026. Do not shop as if peat compost is illegal to buy. Scotland and Northern Ireland need their own check.
Miracle-Gro Miracle-Gro peat-free rose, tree and shrub 2 × 40 L

Testsieger

Miracle-Gro Miracle-Gro peat-free rose, tree and shrub 2 × 40 L
8.4/10about £25.46
View offer

Feed window as printed

The feed window is the months printed on that bag. Which? notes that many general composts feed for about three to four weeks. Do not copy that onto a listing that prints 3, 6 or 9 months. After the window you still need a rose feed. The specialist-versus-multi-purpose case is on rose compost versus multi-purpose. Miracle-Gro prints up to 3 months, both Indigo bags 6 months, Carbeth 9 months. Sylvagrow says long-term slow release and prints no month count. None prints an NPK ratio. A longer window tells you when to feed next. It is not a yield ranking.

Litres, lift, and pence per litre

Ten litres is one patio pot. Forty to 65 litres is a border hole or a barrel. Miracle-Gro is 40 litres, pack of 2, 80 litres listed, 26.6 kg. Reviewers report holed or half-empty bags. Shelf prices run from Indigo 10 litre at about £11.99, about 120p a litre, to Carbeth at about £18.99, about 29p. Sylvagrow is about 45p and is the only bag with an RHS endorsement on the 40 litre size. Pence per litre is not quality. Do not read Indigo's 5.0 from one review as stronger than Miracle-Gro's 4.6 from 523. The short cut is best rose compost in this set.

Common questions

What should I check before I buy rose compost?
Check the job first: a bed blend or a pot that must stay filled. Then read whether the bag prints peat-free, then the feed window as printed, then the litres and the weight you can lift. All five print peat-free. Prices run from about £11.99 for 10 litres to about £25.46 for the Miracle-Gro twin pack.
Do I need a specialist bag or will multi-purpose do?
A specialist bag is convenience and a printed feed, not a proven yield lift. Beds can take multi-purpose plus well-rotted manure if you blend it. Pots and a named long feed are the specialist case. The versus page argues that split.
Does eco-friendly mean the bag is peat-free?
No. Peat-free has to be printed. Eco-friendly and organic are not that line. The Indigo 10 litre listing has both peat-free and eco-friendly. Only the first word answers the peat question.
How long does the feed in the bag last?
As long as that listing prints, and no longer. Miracle-Gro up to 3 months, both Indigo bags 6 months, Carbeth 9 months, Sylvagrow long-term with no month count. After the window, use a rose feed.
How many litres for one rose or a patio pot?
Ten litres is one patio pot in these listings. A shrub in a border wants a blend, not a whole 40 litre bag in the hole. Melcourt's ratio is 1 to 3 or 4 parts soil. A 40–65 litre sack covers a planting or a barrel with mix left over.
Is peat compost illegal in the UK now?
No. The England amateur ban was announced. It was not an Act in October 2026. Do not treat a peat bag as illegal to buy.
Why is a 10 L bag so dear per litre?
Because 10 litres is a patio size. At about £11.99 you pay about 120p a litre for a bag you can carry upstairs. The 65 litre Carbeth sack at about £18.99 is about 29p a litre for the same kind of job at border scale.

Related pages

Compost for roses in pots

Roses compost

Best rose compost among these five amazon.co.uk bags

How to plant roses with bagged compost, step by step

Rose compost vs multi-purpose for beds and patio pots

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 five stored amazon.co.uk listings. A peat-free line and a feed window are listing claims. The Sylvagrow blend ratio is the maker's planting instruction. An RHS endorsement on one 40 litre bag is not a controlled compost test. No Act ending amateur peat sales in England was in force in October 2026.

  1. RHS, planting roses (retrieved 23 October 2026)
  2. RHS, roses in containers (retrieved 23 October 2026)
  3. RHS, replant disease (retrieved 23 October 2026)
  4. RHS, minimising health risks in the garden (retrieved 23 October 2026)
  5. Defra, horticultural peat announcement, 27 August 2022 (retrieved 23 October 2026)
  6. Melcourt SylvaGrow rose, tree and shrub planting compost (retrieved 23 October 2026)
  7. Public Health Scotland, gardening safely, October 2024 (retrieved 23 October 2026)
  8. B&Q, compost buying guide (retrieved 23 October 2026)