Domakihub How to Build a Raised Garden Bed That Lasts
A practical step-by-step guide to planning, building, and filling a raised bed for your garden or terrace.
Reviewed by Domakihub garden pros · 2026-06-23 · 5 min read
A raised garden bed transforms a patch of compact soil, a concrete balcony, or a neglected corner of a holiday villa into a productive, tidy growing space. The video above walks through the full build process; this article breaks it into five ordered steps with material guidance tuned for the Greek climate and the kinds of properties Domakihub serves — private homes, holiday rentals, offices, and hotels. Whether you are upgrading a family home garden in Athens or adding a kitchen-herb feature to a Crete rental, the same principles apply.
Why raised beds work especially well in Greece
Greece's native soil ranges from heavy clay in river basins to thin, rocky ground on hillsides and islands. A raised bed sidesteps both problems: you fill it with the exact growing medium you choose, drainage is built in, and roots never hit a layer of compacted earth or limestone. Summer heat also warms the bed quickly in spring, extending the growing window for vegetables and herbs.
Holiday rental owners and hotel landscape teams have an extra incentive: a neat, framed bed looks intentional and professional, requires less weeding than open ground, and can be replanted seasonally without disturbing the wider garden design.
Choosing your materials
For a frame you have three main choices: untreated hardwood (oak, chestnut, or locally sourced olive wood off-cuts) for a natural look; cedar or larch if you want longer rot resistance without chemical treatment; or powder-coated galvanised steel for a contemporary finish that handles the coastal salt air common across the Aegean. Avoid pressure-treated timber marked for ground contact in older stocks — the preservative compounds can leach into food-growing soil.
Size matters for usability. Keep the bed no wider than 120 cm so you can reach the centre from either side without stepping in. A length of 240 cm is a practical standard. For height, 30 cm is the minimum for most vegetables; 40–45 cm is far more comfortable to work and gives roots more room, which is especially important in the dry Greek summer when deeper soil retains moisture longer.
How to build a raised garden bed: 5 steps
- 1
Mark out and prepare the site
Choose a spot that receives at least six hours of direct sun. Use string lines and wooden pegs to mark the rectangle. If the ground below is grassed or weed-prone, lay a single layer of overlapping cardboard directly on the soil — this suppresses weeds, decomposes within a season, and keeps the bed's soil separate from the ground without blocking drainage. Skip a rigid bottom; you want worms and deep roots to move freely.
- 2
Cut and assemble the frame
Cut your timber to length: two long sides and two short ends. For a 240 x 120 cm bed from 45 mm x 195 mm boards (one board tall), you need four pieces total. Drill pilot holes 15 mm from each end to prevent splitting, then drive 100 mm stainless-steel or hot-dipped galvanised screws through the end boards into the long boards at each corner. For taller beds (two or three boards high), stagger the joints and add internal corner posts — a 50 x 50 mm stake screwed inside each corner adds rigidity and anchors the frame to the ground.
- 3
Anchor and level the frame
Place the assembled frame on your prepared site. Check all four corners with a spirit level; use a mallet to tap corners down or add a thin layer of sand under low spots. For beds on terraces or gravel, secure the frame with long masonry anchors or corner spikes driven into the ground. A frame that moves or rocks will open corner joints over time and let soil escape.
- 4
Fill with a layered growing mix
A practical fill for Greek conditions: place a 10 cm base layer of coarse gravel or rubble for drainage, then fill the rest with a blend of 60% good topsoil, 30% mature compost, and 10% perlite or coarse sand. Avoid pure potting mix — it collapses and becomes hydrophobic in the Mediterranean heat. Water the mix gently as you add each layer to settle air pockets, and top off to within 5 cm of the rim to allow for watering without overflow.
- 5
Install irrigation and plant up
In Greece's dry summers, hand-watering alone is rarely enough. A simple drip line run along the bed and connected to a timer is the single biggest productivity upgrade you can make. Set lines 20–25 cm apart and run the timer for 20–30 minutes before dawn. Once irrigation is in, plant out or sow directly: tomatoes, courgettes, aubergines, and herbs like basil and oregano all perform exceptionally well in raised beds across Greece. Add a thin layer of straw mulch on the surface to slow evaporation and keep roots cool.
Rather have a pro handle it?
Get a vetted gardening pro in your city — one number, booked in EN/EL/DE.
FAQ
- What wood should I use for a raised bed in a coastal or island property?
- Cedar and larch are the top choices for longevity in salt-air environments, typically lasting 10–15 years untreated. If budget is tight, pine is acceptable but paint the cut ends with linseed oil and expect to replace boards after 5–7 years. Avoid cheap softwood labelled 'treated' unless you can confirm it uses modern, food-safe preservatives.
- How deep does a raised bed need to be for vegetables?
- A minimum of 30 cm is workable for shallow-rooted crops like lettuce and herbs. For tomatoes, courgettes, and aubergines — the staples of a Greek kitchen garden — aim for 40–45 cm. Deeper beds retain more moisture, which is critical during July and August when rainfall in most of Greece is essentially zero.
- Can I build a raised bed on a balcony or rooftop terrace?
- Yes, with two precautions. First, confirm the structural load capacity with a building professional — a filled 240 x 120 cm bed at 45 cm depth can weigh over 400 kg. Second, use a proper drainage layer and make sure any overflow can escape without pooling against walls or running into downpipes. Lightweight perlite and coconut coir mixes reduce weight while keeping drainage excellent.