40mm Green Slate

A customer favorite in our decorative stone collection, Green Slate offers a stunning blend of grey and green hues, enhanced by subtle silver highlights. Its rustic, flat pieces with angular finishes add texture and depth to any outdoor space, creating a beautifully natural look.

Sustainably sourced from North Wales, this environmentally friendly slate is lime-free and fully recycled, making it a responsible choice for garden projects. With an average size of 40mm, it’s highly versatile for pathways, borders, and decorative accents. When wet, its muted tones deepen, revealing richer shades of grey and green for a striking effect. Plus, it's 100% fish-friendly, making it ideal for ponds and water features.

Why Choose Green Slate?
✔ Natural Beauty – A unique mix of colors and textures enhances any garden design.
✔ Eco-Friendly – Sourced sustainably and fully recycled for minimal environmental impact.
✔ Versatile – Suitable for pathways, borders, ponds, and decorative landscaping.
✔ Fish-Safe – A perfect addition to aquatic features.

Available in 20mm stones, 40-75mm paddlestones, and rockery pieces, Green Slate offers flexible options to suit various landscaping needs. Elevate your outdoor space with this timeless and sustainable decorative stone.

40mm Green Slate Features

• Great for garden borders or features
• Best-seller for years
• Locally-sourced
• Fish-friendly

40mm Green Slate for Your Garden

Green Slate decorative stones provide the perfect finishing touch to your garden, creating a natural and cohesive look. With their subtle mix of grey and green hues, these stones add texture and depth, enhancing the beauty of any outdoor space.

Due to their slightly larger size, Green Slate stones are best suited for decorative features rather than high-traffic areas like pathways or driveways. A popular use is framing hard landscaping elements such as garden paving, patios, or grass areas. Their angular finish adds a rustic charm, making them a great fit for both natural and contemporary designs.

Green Slate is also an excellent choice for low-maintenance front gardens. If you're looking for a stylish yet easy-to-maintain solution, simply lay the slate over a weed fabric to reduce upkeep. It also makes for a beautiful border around the front or sides of your house, giving your outdoor space a polished and tidy appearance.

This versatile and eco-friendly decorative stone is perfect for creating an effortlessly stylish garden with minimal effort.

40mm Green Slate for a Garden Pond

If you're fortunate enough to have a garden pond, Green Slate is an ideal decorative choice! Its natural blend of green and silver hues becomes even more striking when wet, making it perfect for enhancing water features. Many gardeners use Green Slate both around the pond’s outer edge and submerged just below the waterline to elevate its aesthetic appeal.

Completely lime-free and fish-safe, Green Slate is a great option for ponds with aquatic life. Beyond its decorative charm, it also serves a practical purpose—creating steps for small creatures like frogs and birds to access the water easily. Layering Green Slate around your pond can help establish a multi-tiered, natural look, adding both function and beauty to your outdoor space.

How to Buy 40mm, Green Slate

Available Pack Sizes

20kg maxi bags 

850kg bulk bags (approx weight)

This stone can be collected for free at one of our depots in Wimborne, Bournemouth, Christchurch or Dorchester, or these garden stones can be delivered nationally to anywhere in the UK.

You can use our Stone Calculator to work out how much of this stone you need - simply enter the measurements of your garden, the depth at which you want to lay the stone and it will work out how much you need!

How to Create a Garden Pond 

Whether you’re envisioning a sleek, modern pond as a garden focal point or a natural pond to attract wildlife, creating your own beautiful and budget-friendly pond is easier than you might think. Follow these steps to bring your vision to life:

1. Choose the Perfect Spot

Select a location that avoids overhanging trees to minimize fallen leaves, which can pollute the water. Ideally, find a balance of sunlight and shade—shade helps prevent overheating, which can affect wildlife and plant health.

2. Decide on Size and Type

For a ground-level pond, consider using a pre-formed plastic pond from a garden center. Mark the area with spray paint to match the pond’s dimensions before digging.

For a raised pond, use retaining sleepers lined with a plastic sheet, or get creative by upcycling items like an old washing basket for a unique design.

3. Prepare the Area

For ground-level ponds, dig to the desired depth, then place the pre-formed pond in the hole. Fill any gaps with scalpings to provide stability and support.

4. Add Water & Features

Once the structure is in place, fill your pond with water. Enhance it by adding a solar-powered pump or a small fountain to create movement and a relaxing soundscape.

5. Decorate & Style

Customize your pond to match your vision:
✔ For a natural look – Surround the pond with rockery stones and add smaller stones like Green Slate for texture.
✔ For added charm – Include water plants to enhance aesthetics and support local wildlife.

Final Touches & Maintenance

As our Decorative Stones are naturally sourced, slight variations in color and texture are expected. If stones arrive with a light dust coating, simply rinse them with water to reveal their true beauty.

By following these steps, you’ll create a stunning, low-maintenance pond that blends seamlessly into your garden while supporting the surrounding ecosystem!

Buy With Confidence

• Our 40mm Green Slate can be purchased in 20kg maxi bags or bulk bags that weigh approx. 850kg
• Please select the bag size you'd like to buy and add it to your basket 
• Our aggregates will either arrive on a HIAB lorry that can be used to lift the stone onto your garden, or it will arrive on a pallet for kerbside delivery; depending on your address
• You can choose a free collection from one of our Depots or fuss-free, home delivery.

A Service You Can Rely On

• Our reliable service offers prompt delivery to any area in the UK
• Stone Zone is a family-run business that has been well-established since 1998
• Our efficient customer advisors can help you with your purchase
• We pride ourselves on offering a range of affordable garden supplies 

Sample stones are available in-store and online, please ask a customer advisor. 

A Delivery Service Tailored to You

Our top-rated delivery service is flexible and reliable to suit you, however, it can cary depending on where you live. Click here for more information on our delivery service and if your postcode is classed as 'local' or 'national.'

Any questions? Use our live chat to speak to an advisor, alternatively, you can fill out an enquiry form or call us on 01202 874207.