Welcome to Growseed’s free UK seed spacing and quantity calculator – designed for gardeners of all experience levels. Whether you’re sowing a few lettuces in a small raised bed or planning out rows of runner beans on your allotment, this tool helps you:
Correct spacing makes all the difference between a thriving harvest and a failed crop. With the right plant distance, you’ll:
Our calculator includes spacing guidelines for 35+ vegetables—from beetroot and broccoli to courgettes and chard. Each crop has different needs, and this tool adjusts automatically based on your chosen variety.
You’ll also get a direct link to purchase that seed variety right from our catalogue.
As a UK-based seed supplier, Growseed is trusted by thousands of growers for:
Each seed in this calculator links directly to its product page—so you’re always one step away from growing success.
Use our free calculator below to get estimated harvests, seed spacing, and thinning recommendations tailored to your chosen vegetable.