A raised garden bed should be a size you can reach across, a height you can work at comfortably and a material that suits your site. Choose the location first, then the dimensions, then the build. The table below turns those decisions into a checklist.
Choose the Site, Then the Footprint
Observe your yard through a day. Note where the sun falls, where water collects and where you can easily reach with a hose. A bed is hard to move once it is full, so settle the location first.
- Choose level ground with a clear path around the bed.
- Keep it close to a water source.
- Leave room for a wheelbarrow or a kneeler.
Width matters for access. Beds that can be reached from both sides are often about 1.2 m (4 ft) wide, since you can reach to the middle without stepping in. Beds against a fence or wall are usually narrower.
Decision Criteria
| Factor | Why it matters | What to check |
|---|---|---|
| Height | Affects bending, soil volume and cost of fill | Low for ease of filling, taller for comfort |
| Material | Sets the look and lifespan | Wood, metal, composite or stone; read maker’s care notes |
| Corners | Hold the walls together | Sturdy joints or brackets |
| Bottom | Allows drainage | Open base on soil, or drainage holes if on a hard surface |
| Assembly | Affects the time it takes | Tools needed and number of parts |
| Weight when full | Soil is heavy | Surface strength under the bed |
Material Notes
Each material suits a different taste and climate. Wood has a natural look and can be cut or reshaped. Metal beds are neat and long-lasting but can feel warm in strong sun. Composite and plastic are lighter and easy to assemble. Stone or brick is permanent but needs planning. Follow the maker’s guidance on treatments and any product label directions.
Before You Buy
- Mark the bed outline on the ground with string or a hose.
- Check the sun in that spot over a full day.
- Decide on height, with your back and knees in mind.
- Estimate how much soil you will need by multiplying length, width and depth.
- Check that the walls are firm when assembled.
Think ahead about how you will care for the bed once it is in place. A narrow lip on top gives you somewhere to sit while you work, and a smooth inner surface makes it simpler to clean. If you plan to add hoops, netting or a trellis, check that the walls can take brackets or posts, and follow the maker’s guide for any fixings.
FAQ
Can I place a raised bed on a patio?
Yes, if there is drainage and the surface can hold the weight. Choose a bed with a base or holes and keep it on a level spot.
How tall should the walls be?
Walls of about 30 cm (12 in) suit many plans. Taller walls are easier on the back but need more fill.
The Short Version
Choose the site, keep the width reachable, then compare height, material and assembly. Measure before ordering fill.