September 2026 · UK planting calendar
When to sow, plant and pick. Worked out for your town.
Planting dates calibrated to your local frost history, not a generic UK calendar.
In season now
What to grow now
Perpetual Spinach
last month to sow outdoors
Sow outdoors April to September, harvest June to November.
Pak Choi
last month to sow outdoors
Sow outdoors May to September, harvest June to October.
Spinach
last month to sow outdoors
Sow outdoors March to September, harvest April to October.
Swiss Chard
last month to sow outdoors
Sow outdoors April to September, harvest July to November.
Mizuna
last month to sow outdoors
Sow outdoors April to September, harvest May to October.
Mustard Greens
last month to sow outdoors
Sow outdoors April to September, harvest May to October.
Why the town matters
Penzance gets about twelve more frost-free weeks a year than Edinburgh.
Every sowing, planting-out and harvest window on this site is worked out from the average last spring frost and first autumn frost where you actually garden, taken from 30 years of Met Office records, and what each plant can put up with.
They're averages, not promises. A late frost can still flatten your courgettes, so keep an eye on the forecast. That's gardening.
Where the dates come from →Same tomato, different towns
Penzance
last frost ≈ 23 Mar · 247 frost-free days
Sow indoors February, plant out April, harvest June to November. Frost risk November to March.
Edinburgh
last frost ≈ 4 May · 165 frost-free days
Sow indoors March to April, plant out May to June, harvest August to October. Frost risk October to May.
Met Office HadUK-Grid · 30-year averages
From the blog
10 Aug 2026
UK Drought 2026: How to Keep Your Garden Alive (Even With Hosepipe Bans)
Hosepipe bans don't mean a dead garden: what to water first, how to stretch every litre, and what's still worth planting.
Read the blog →Start with your town.
Free, and you don't need an account. Type your town and every date on the site is worked out for it.