Raised Bed Vegetable Gardening for Small Spaces

Raised beds solve several problems at once: poor soil, bad drainage, awkward access and short seasons. They are especially useful in small gardens where every square metre counts.

Choose the right size

A bed 1.2 m wide lets you reach the middle from either side without stepping on the soil. Length is flexible. Depth of 25–30 cm suits most vegetables; root crops may need more. Keep paths wide enough for a wheelbarrow.

Build with safe materials

Untreated timber, cedar, or galvanised metal are good choices. Avoid old railway sleepers and unknown reclaimed wood that may contain preservatives. Line the base with cardboard to suppress weeds and encourage worms.

Fill with living soil

Use a mix of topsoil, compost and well-rotted organic matter. Avoid filling beds entirely with lightweight compost, which dries out and shrinks. A soil-based mix holds moisture and nutrients better.

Plan for water

Raised beds drain quickly. Install drip irrigation or use soaker hoses before planting. Mulch heavily. In hot weather, check moisture every day or two, especially in small beds.

Plant intensely, but not overcrowded

Use succession sowing and intercropping: quick radishes between slower brassicas, lettuce under taller plants. Follow crop rotation between beds each year. Companion flowers such as calendula and marigold add colour and attract beneficial insects.

Maintenance

Top up compost each season. Repair boards as needed. Avoid walking on beds; compacted soil defeats the purpose. With care, a raised bed can be productive for many years.