Plum Slate 20mm Bulk Bag

20mm Plum Slate – Premium Decorative Slate for Borders, Pathways and Garden Landscaping

20mm Plum Slate is a highly popular decorative aggregate loved for its rich, deep purple tones that bring warmth and colour to any outdoor space. This premium slate creates an elegant, contemporary look that suits both traditional gardens and modern landscape designs. The 20mm size is perfect for pathways, borders, rockeries, pots, raised beds and low-maintenance ground cover.

The natural flaked shape of the slate helps it lie flat, creating a stable surface that stays neat and tidy with minimal movement. When wet, the colour deepens dramatically into a darker, almost burgundy shade, giving your garden a striking visual contrast through all seasons. Its durability and low-maintenance nature make it a long-lasting decorative option for domestic and commercial projects.

20mm Plum Slate also helps retain moisture in planting areas and suppress weeds when used with a membrane, making it a practical as well as attractive ground cover. It is suitable for water features and ponds (fish-safe once rinsed), adding a deep, luxurious colour without leaching harmful materials.

Supplied in bulk bags, our 20mm Plum Slate is clean, consistent and ready for immediate use in all types of landscaping projects.

Key Benefits:

• Rich plum and purple tones for a bold, eye-catching finish

• Ideal for borders, paths, rockeries and decorative ground cover

• Flat, natural slate flakes help create a neat, stable surface

• Colour deepens beautifully when wet

• Helps suppress weeds and retain soil moisture

• Long-lasting, low-maintenance and environmentally friendly

• Suitable for ponds and water features once washed

• Supplied in bulk bags for excellent coverage and value

Typical Uses:

• Garden borders and planting beds

• Decorative pathways and walkways

• Rockeries and feature garden designs

• Water features, ponds and streams

• Ground cover in low-maintenance gardens

• Landscaping around patios and seating areas

Installation Tips:
Lay to a depth of 40–50mm for decorative areas or 50–60mm for better coverage and durability. Always use a weed membrane underneath to reduce maintenance and keep your slate looking tidy. Rinse the slate lightly after laying to remove dust and reveal the full depth of colour.

Why Choose Us?
We supply premium 20mm Plum Slate sourced from trusted UK suppliers. Clean, consistent and visually striking, our slate delivers a professional finish with long-lasting durability. Combined with reliable delivery and high-quality materials, it’s the perfect choice for landscapers, gardeners and homeowners.