Formal Garden Ideas with Pleached Trees & Clipped Hedges

By Paul Watmore, Director at Grasslands Nursery

The hallmarks of a formal garden are clean lines, symmetry and evergreen structure — created with clipped hedges, topiary and pleached trees. A low box hedge to edge the beds, matched topiary by a doorway, and pleached trees along a boundary give instant elegance and year-round structure. Here are the key ideas.

Structure and symmetry

Formal gardens are built on geometry — straight lines, mirrored planting and clipped shapes. Evergreens do the heavy lifting because they hold that structure all year.

Clipped hedges to define the space

Use low hedges to edge beds and paths or create a parterre — box is the classic, or Ilex crenata as a blight-resistant alternative. For taller dividing ‘walls’, yew clips to a crisp, dense finish.

Topiary as focal points

Matched pairs of topiary balls or cones flanking a door, path or steps instantly read as formal. Repeat a shape along a border for rhythm.

Pleached trees for elevated formality

Pleached trees — a clear stem topped with a trained panel — create an elegant raised screen along a boundary or driveway, adding height and privacy while keeping a formal line. They are a favourite for framing a view or lining an approach.

Keep it evergreen and low-maintenance

Choosing evergreens such as yew, box alternatives, bay and Portuguese laurel keeps the formal framework looking sharp in every season with just one or two trims a year.

FAQs

What makes a garden look formal?
Clean lines, symmetry and clipped evergreen structure — hedges, topiary and pleached trees — that hold their shape all year.

What are the best plants for a formal garden?
Box (or Ilex crenata), yew, bay, Portuguese laurel for hedging and topiary, plus pleached trees for elevated structure and screening.

How do you use pleached trees in a formal garden?
Plant them in a line along a boundary or driveway to create an elegant raised screen, adding height and privacy while keeping a crisp formal line.

What is a low-maintenance formal hedge?
Yew and Ilex crenata both clip to a crisp formal finish and need only one or two trims a year.

About the author: Paul Watmore is a director at Grasslands Nursery, a family-run plant nursery near Knutsford, Cheshire, growing hedging, pleached trees and specimen plants since 1984. Meet the team →