Bamboo Palette

Give the bed a workable plan

A raised bed is easiest to manage when its dimensions, soil and planting plan agree. Measure the inside space, keep every part within comfortable reach, and choose crops that fit the season and the site. A simple grid helps organise ideas, while notes from each harvest make the next planting more realistic.

Put an idea into practice →

Fill and space the bed

Choose your values, then try the tool.

Rectangular internal dimensions. Allow for settling; each crop has its own spacing needs.

Plan the inside dimensions first, then leave room for plants to become full-sized plants.

Size the bed for the gardener

Choose a position with access to water and light suited to the crops you want to grow. Before building, mark the outline on the ground and test whether the middle is comfortably reachable from the paths. Leave enough space around the bed to kneel, carry tools and move whatever cart you use. Measure internal dimensions for the soil calculation; thick sides can make the usable space smaller than the outside footprint suggests. A modest bed that is easy to tend is a better first experiment than a large one that is awkward to reach.

Calculate fill without guessing

The volume tool multiplies internal length, width and depth, then expresses the result in litres. For a bed with an uneven base, take several depth measurements and use a reasonable average, noting that it remains an estimate. Growing mixes settle, so plan how you will top up the bed over time rather than compacting everything heavily at the start. Choose materials suitable for vegetable growing and the site's drainage. Record what went into the mix and when, since future improvements are easier to judge when the starting point is known.

Use a grid as a sketch

A square planting grid divides the bed into positions at a chosen spacing. The calculator counts whole spacing intervals that fit along each side; it offers a planning count rather than a promise that every crop belongs at that distance. Check the mature spread and growing habit of each variety, including access needed for harvesting. Tall crops can shade shorter neighbours, while trailing plants may extend well beyond the board edge. Draw those shapes into the plan so the finished planting is considered in three dimensions rather than as a page of identical dots.

Keep a useful crop history

Record what grew in each part of the bed, including planting dates, harvests and any recurring problems. Grouping related crops in the notes makes it easier to consider rotation when planning another season, although the practical arrangement depends on the space and crops available. Add observations about watering and how the soil behaved after rain. An empty space between crops can be planned for a later sowing rather than filled immediately with something unsuitable. The notebook should explain the decisions that worked, not simply list every seed packet purchased during the year.

Words to work with

Internal dimension
A measurement taken within the bed's sides, describing the space actually available for soil and plants.
Planting spacing
The intended distance between plant positions, chosen for the crop, variety and growing arrangement.
Succession sowing
Sowing a crop in separate batches over time to spread harvests or refill suitable growing space.