Date checked: 3 April 2026.
This page compares verified UK horticultural worm castings product pages on a like-for-like 20 litre basis where possible. The aim is to show bag size, consumer-facing price, delivery notes and price per litre without relying on vague “from” prices.
For our own product detail, see 20L Worm Castings – Fresh UK Vermicompost and the wider worm casts category. Prices, stock and delivery rules can change, so treat this as a dated snapshot rather than a permanent market claim.
| Seller | Product | Bag size | Listed price | Price per litre | Delivery note shown | Source |
|---|---|---|---|---|---|---|
| Worms Direct | 20L Worm Castings – Fresh UK Vermicompost | 20L | £7.99 | £0.40/L | Tracked 48 from £3.99 on orders under £40, based on our published delivery page. | Product page | Delivery info |
| Willy Worms | 20 Litres of Pure Worm Casts | 20L | £9.99 | £0.50/L | Shipping is calculated separately rather than shown as a fixed product-page rate. | Source |
| Growcery | Growcery Worm Castings | 20L | £19.99 | £1.00/L | Free UK shipping over £40; Royal Mail Tracked 24-hour delivery is shown as £3.49 below that threshold. | Source |
| Shropshire Turf | Worm Casts | 20L | £27.46 inc VAT | £1.37/L | The product page says deliveries are a minimum of 5 bags or with another item such as topsoil. The same page exposes the 20 litre variant at £22.88 ex VAT / £27.46 inc VAT. | Source |
Snapshot takeaway: On the verified 20 litre horticultural product pages checked on 3 April 2026, Worms Direct had the lowest listed single-bag price in this sample.
Methodology
This comparison focuses on verified product pages for worm castings or closely related vermicompost products aimed at gardeners. We excluded bait-focused worm products and broad compost blends so the sample stays closer to like-for-like horticultural use.
- We compared consumer-facing prices rather than relying on generic category pages.
- Price per litre is rounded to the nearest penny.
- When a seller uses product variants, we used the specific 20 litre option rather than the default “from” price.
That last point matters for Shropshire Turf. Its page headline shows a lower default price because the 5 litre option is selected first, but the 20 litre variant data on the page on 3 April 2026 was £22.88 ex VAT / £27.46 inc VAT.
Why this matters for buyers
Gardeners often search for worm cast, worm casts, worm castings and vermicompost interchangeably. A proper comparison helps separate headline price from actual value, especially when delivery rules, VAT treatment, minimum order thresholds or smaller pack sizes change the real cost.
If you are still comparing terminology, our guide on worm compost and worm casts explains the language in more detail.
FAQ
Is Worms Direct the cheapest worm castings option in the UK?
On the verified 20 litre horticultural product pages checked for this comparison on 3 April 2026, Worms Direct had the lowest listed single-bag price in this sample. That is a dated sample finding, not a permanent universal claim.
Why compare price per litre instead of headline price only?
Price per litre makes it easier to compare different bag sizes fairly. A low headline price can work out more expensive once you adjust for a smaller bag, VAT differences or stricter delivery terms.
Why is Shropshire Turf much higher than the page headline price?
Because the page defaults to the 5 litre option. The verified 20 litre variant on that same page was £22.88 ex VAT / £27.46 inc VAT on 3 April 2026.
