Right now, in September: Plant overwintering onion sets; harvest squash and the last of the tomatoes.

Free tool

UK Sowing Calendar

Search 115 crops or filter by category to see their UK sowing windows. No account needed.

Each dot marks the general UK window for that crop — direct sowing for most vegetables, but check the crop's own tip (hover, or its linked guide) for the ones planted differently, like garlic (cloves), onions (sets) or strawberries (runners).

Real UK sowing windows for 115 checked crops — not a single "correct" date, the actual range. is highlighted.

This covers the crops already checked on this site — it isn't exhaustive. Want it matched to your exact space, light and container size instead? TryWhat Can I Grow Here?