28 · Edging, Hardscape & Lighting
The edge is where the pond meets the garden. Get it right and the liner vanishes; get it wrong and it looks like a plastic tub. Lighting extends the joy into the night.
Coping and edging
- Overlap the liner 30–60 cm beyond the water and tuck it under coping stones or a soil lip so it disappears.
- Use flat, stable stones set slightly proud of the waterline so rain runs away from the pond, not in.
- A gravel beach (cobbles set in the liner) gives wildlife a gentle entry and a natural look.
Planting pockets
- Build soil pockets in the upper shelves and behind the coping for marginals and moisture-lovers.
- Let some plants spill over the edge to soften the hard line.
Lighting
- Submersible LEDs highlight waterlilies and fish; keep them low and angled to avoid glare.
- Up-lighting on a feature rock or statue adds drama.
- "Moonlighting" (a soft light high in a nearby tree) reads most natural.
- Use low-voltage (12 V) systems on a timer or photocell.
Wildlife & light
Strong, all-night lighting disturbs nocturnal amphibians and insects. Use timers so the pond returns to darkness, and avoid shining directly on shallow breeding shelves.
Hardscape materials
| Material | Effect on water |
|---|---|
| Granite / slate / quartz | Neutral; safe, durable |
| Limestone / marble | Raises pH/KH — fine for some, not all |
| Treated timber | Avoid contact with water (chemicals); use only above the line |
| Concrete (uncured) | Leaches lime; cure/seal before flooding |
Edging procedure
- Fold the liner edge neatly, avoiding bulk.
- Lay large, flat stones over the folded edge, pressing firmly.
- Work around the perimeter, keeping the water level 25 mm below the stone lip.
- Fill gaps between stones with mortar or planting.
- Conceal any visible liner with smaller stones, gravel, or creeping plants.
Lighting design
- Use low-voltage (12V) LED for safety and efficiency.
- Position lights to shine across the water, not into it.
- Uplight waterfalls and specimen plants.
- Submersible lights create dramatic effects but attract algae to the fixture.
- Solar lights are fine for accent but unreliable for primary lighting.