3 For 2 on Christmas Cropping Potatoes

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Buy 1 Get 1 Half Price Garden Ready Bedding

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3 for 2 on Same Variety 9cm Plants

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Add this product to your basket PLUS a further £10 worth of any products. The free item will be automatically discounted during check out. Hurry! Only available for the first 2,023 orders - ends midnight Monday.

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Buy 1 Get 1 Half Price on same variety Super Plugs

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Buy 3 get get 3rd free on the same variety and size plants. Please add 3 to your basket and the offer will automatically apply at checkout.

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3 for 2

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Free Delivery Valentine's Day Offer

As a Valentine's Special Offer, we are offering this product duo with delivery included. Order by end of Sunday 11th Feb for guaranteed delivery in time for Valentine's Day.

Shell on Earth Super Crush Whelk Shells 1kg

Shell On Earth


Catalogue Code: 10909338

Sale price

In stock

Regular price £6.49
Enhance your garden with perfectly crushed and sifted Whelk shells, great for delicate plants like succulents. They promote soil health and add a pleasing touch to your garden.

Pack Contents: 1 Bag of 1kg Super Crushed Whelk Shells

Size: 1kg


  • Natural product from the sea
  • Deters slugs and fungus gnats
  • Biodegradable paper bags with tie handles - 100% recyclable
  • Good for drainage

Elevate your garden with finely crushed whelk shells. Meticulously prepared for gardening, this 1 kg bag boasts a superior crush for top dressing plants and pots. A by-product from a small, sustainable family seafood business in the heart of West Wales. Whelks are caught locally with low-impact pots, processed for restaurants, and then crushed, washed three times, and dried into award-winning mulch. 

These crushed shells have multiple uses, such as improving drainage and aerating soil. They also act as a natural mulch to retain soil moisture and protect plants from slugs when applied in a 20-30mm layer around their base. They make a great substitution for potting grit and are extremely effective as a slug deterrent.

Expertly crushed and sifted, these shells are crafted to create smaller, evenly-sized pieces that can be effortlessly placed on your soil. Ideal for delicate plants like succulents, these finely crushed shells will not only add a pleasing touch to your garden, but also promote its overall well-being.

Pair these delicate shells with the Potting Up Scoop, the ultimate tool for effortless scooping and decanting of shells and other substrates. Crafted for your ease, the scoop guarantees a smooth shift from bag to garden.

About Shell on Earth

Shell On Earth, a charming family venture led by Jordan & Caryl Andrews, transforms crushed whelk shells from their family’s seafood processing factory into garden and landscaping solutions. Located in Frondolau quarry in New Quay, West Wales, with a history of 40 years, the factory has a rich heritage of seafood processing and community involvement.

The journey started with Jordan's late grandfather who turned this site into a thriving seafood processing center for local fishermen and vivier lorries. With the help of Jordan's parents, the factory have broadened their scope to include the exceptional Welsh whelks, caught using traditional pots.

Shell On Earth, launched in 2019, proudly presents their collection of recycled whelk shells for gardens across the UK. With an estimated 5,000 tonnes of shells wasted every year in the UK fishing industry, their mission is to reduce waste and promote a circular economy. Each repurposed shell brings us one step closer to a greener future.


We know how important your garden is to you. We've listened to our customers and introduced a new improved speedy delivery service, meaning Express delivery comes as standard.

*Orders to Northern Ireland have an automatic additional £3.00 delivery surcharge applied at checkout. 

Order TypeDelivery ChargeDelivery Charge
Seed only order£2.49If you purchase any other items you'll be charged the standard delivery rate of £5.99
Plants, bulbs & gardening accessories£5.99If we need to split your order into separate deliveries we'll only charge one delivery fee
Extra large or long plants & heavy items£9.99These are clearly displayed at check-out
Compost (and any other large or heavy items)£5.99

These items are subject to a delivery multiplier where orders containing 3 or 4 items will be subject to an additional £5.99 for every further 2 items added. This is automatically applied at check-out:

  • 1 - 2 bags £5.99
  • 3 - 4 bags £11.98
  • 5 - 6 bags £17.97
  • 7 - 8 bags £23.96
  • 9 - 10 bags £29.95

If you'd like more than 10 bags of compost please call our Customer Service team who can arrange for a bespoke competitive quote on 01480 774555 (standard network charges apply)

For more detail on specific delivery queries and compost delivery please click here

Delivery to outside of Great Britain

We regret we are unable to deliver any items outside of some Great Britain delivery addresses. This includes Europe, Channel Islands, Republic of Ireland, USA and Rest of World. We will update our website if this changes. 

We now deliver to Northern Ireland, additional delivery surcharges automatically apply at checkout. 

For more information about our deliveries please click here.