01 - Site
Choose the spot before the bed.
- Sun: most fruiting vegies want six or more hours of direct sun. Watch the spot across a day; winter shadows from fences and houses are much longer than summer ones.
- Wind: on the coast, a bed in the lee of a shed or hedge will outperform a bed in the open. Avoid funnels between buildings.
- Level ground: level the footprint so the bed sits evenly and water does not pool at one end. Remove lumps, rocks and roots.
- Access: keep at least one side reachable, and leave room for a wheelbarrow. For wider beds, check you can reach the middle.
- Water: closer to a tap means you will actually water it in January.
- Weeds: for open-bottom beds over lawn or kikuyu, mow low and lay thick cardboard first. Running grasses will try to come up through the soil.
02 - Drainage
Where does the water go?
If your ground is heavy clay (found in parts of South Gippsland), water can sit at the bottom of an open bed after winter rain. Choose a slightly higher spot and avoid low corners where runoff collects. Adding a coarse layer does not fix waterlogged ground; check drainage before filling and seek site-specific advice if water remains after rain.
If your ground is sand, drainage is rarely the problem; holding water is. Add more compost and organic matter, mulch deeply and consider a sealed base with wicking.
If the bed is on pavers, concrete or decking, water draining from an open or unsealed bed can stain or pool on the surface. Think about where it will flow, and check the surface can take the weight of a filled bed. A sealed base changes how water leaves the bed, so plan its overflow. Get professional advice for decks, balconies and rooftops.
03 - Soil and volume
More litres than you think.
A full-height bed holds a surprising amount. The builder calculates litres for the exact size you choose, assuming the bed is filled to the rim. Mix settles over the first season, so plan to top up.
A common approach for 830 mm beds is to layer:
- Bottom third: coarse organic material such as branches, prunings, straw or old logs. It takes up space cheaply and breaks down slowly.
- Middle: rougher compost, manure and leaf litter.
- Top 300 mm or so: a good-quality garden or vegie mix, where most roots will live.
Half-height 415 mm beds hold far less, so many people skip the coarse layer and fill with mix and compost throughout. Avoid timber treated with preservatives in any fill layer.
04 - Seasons
Gippsland is not one climate.
Pick the description closest to your garden. Timing varies by year and by block, so treat this as a starting point and watch local conditions.
Soil in a raised bed warms sooner than the ground, but salt-laden southerlies still knock tender seedlings. Plant tomatoes and beans once nights settle, usually later in spring, and use a temporary windbreak on exposed blocks.
Sandy coastal soils dry fast, and so do raised beds. Mulch well and water early. A wicking setup can ease the load, but check the reservoir in hot spells.
Mild coastal autumns are excellent for brassicas, leafy greens and garlic. Get them in while the soil is still warm.
Frost is less common near the water, so broad beans, peas, silverbeet and onions keep going. Wind is usually the bigger limiter than cold.