Scottish growing tool
Seed Spacing Visualiser
Pick a crop and enter your bed size. This shows how the plants actually lay out, how many fit, and where each spacing figure came from.
How it works
Every spacing comes from the crop's RHS growing guidance. The visualiser divides the bed's width by the spacing between plants, and its length by the spacing between rows, rounding both down. That's the cautious reading of "plant 30cm apart": each plant gets its full share of the bed, so the count never promises more than will fit. Where the RHS gives one spacing and no separate row spacing, it uses the same figure both ways and says so. Potatoes depend on the type: first and second earlies go 30cm apart in rows 60cm apart, maincrop 37cm apart in rows 75cm apart.
A worked example
A raised bed 1.2m wide and 2.4m long holds 40 lettuces: five across at 22.5cm, in eight rows 30cm apart. The same bed takes ten kale plants at 45cm each way, or 384 carrots at 5cm in rows 15cm apart.
What it won't tell you
It doesn't estimate a harvest, because published yield figures are missing for almost every crop, and a made-up number would be worse than none. Mint gets no grid at all: it's grown as a contained clump in a pot rather than spaced out, since it spreads underground by rhizomes.