We're offering you a Shell on Earth - Crushed Whelk Shells for £11.99, saving you up to 40% off Thompson and Morgan's's price of £19.99 (correct as of 15.12.2025).

Add a Natural Barrier & Coastal Charm to Your Garden

Transform your garden with sustainably sourced crushed whelk shells from the Welsh coast. These natural shells not only create an effective, non-chemical barrier against slugs and snails but also give your borders, beds, and pots a fresh coastal finish. Sourced by a family-run business using low-impact methods, each bag helps support local communities and responsible marine practices.

• Pest Protection: The sharp texture of crushed shells deters slugs and snails from reaching your prized plants—no chemicals needed.
• Versatile Mulch: Use as mulch for moisture retention, weed suppression, and improved soil aeration around flowers, shrubs, and vegetables.
• Sustainable Choice: Produced from a seafood by-product that would otherwise go to waste—good for your garden and the planet.
• Attractive Finish: The bright shells add striking texture and visual interest to planters, rockeries, and pathways.

How to Use Crushed Whelk Shells in Your Garden

• Where: Apply around the base of plants in borders, raised beds, containers, or vegetable patches.
• When: Best applied in spring or early summer when slug activity is highest. Top up as needed throughout the season.
• How: Spread a generous layer (1–2cm thick) directly onto soil surfaces for immediate protection and decorative effect.
• Caring Tips: For best results, clear away any existing mulch before applying. Replenish annually or after heavy rainfall if needed.

Sizing & Coverage

• Bags: Available in 11kg or 18kg sizes to suit gardens big or small.
• Covers: Each bag covers approximately 0.5mb2—ideal for mulching flowerbeds or creating pest barriers around edible crops.

Sustainability Promise

• This product is made using shells collected through traditional fishing methods in West Wales—supporting coastal livelihoods and the circular economy.
• Packed in robust, fully recyclable bags designed to minimise environmental impact.

FAQs

• Can I use these shells around edible crops?
  Yes—crushed whelk shells are safe for use around vegetables and herbs as a natural pest deterrent.
• Will the shells affect soil pH?
  The shells are primarily calcium carbonate and may slightly raise soil pH over time; ideal for most ornamental plants but check preferences for acid-loving species.
• How often should I reapply?
  The barrier remains effective until broken down by weather; top up annually or after heavy rain to maintain coverage.