GardenCalc
Pick your city for its frost dates and a dated sowing table for 15 crops. Every date comes from Met Office 5 km frost records for that city, anchored to the safe (9 years in 10) last-frost date. Not your city? Use your postcode.
Cities
London
Safe to plant out from 14 Apr. First autumn frost around 21 Nov. 259 frost-free days.
Sowing windows for London →Birmingham
Safe to plant out from 11 May. First autumn frost around 9 Nov. 211 frost-free days.
Sowing windows for Birmingham →Manchester
Safe to plant out from 10 Apr. First autumn frost around 20 Nov. 245 frost-free days.
Sowing windows for Manchester →Leeds
Safe to plant out from 12 May. First autumn frost around 8 Nov. 212 frost-free days.
Sowing windows for Leeds →Glasgow
Safe to plant out from 6 May. First autumn frost around 10 Nov. 215 frost-free days.
Sowing windows for Glasgow →Edinburgh
Safe to plant out from 9 May. First autumn frost around 10 Nov. 210 frost-free days.
Sowing windows for Edinburgh →Bristol
Safe to plant out from 21 Apr. First autumn frost around 12 Nov. 224 frost-free days.
Sowing windows for Bristol →Liverpool
Safe to plant out from 10 Apr. First autumn frost around 23 Nov. 251 frost-free days.
Sowing windows for Liverpool →Sheffield
Safe to plant out from 27 Apr. First autumn frost around 20 Nov. 232 frost-free days.
Sowing windows for Sheffield →Cardiff
Safe to plant out from 21 Apr. First autumn frost around 20 Nov. 235 frost-free days.
Sowing windows for Cardiff →Newcastle upon Tyne
Safe to plant out from 3 May. First autumn frost around 10 Nov. 214 frost-free days.
Sowing windows for Newcastle upon Tyne →Nottingham
Safe to plant out from 21 Apr. First autumn frost around 15 Nov. 222 frost-free days.
Sowing windows for Nottingham →Norwich
Safe to plant out from 7 May. First autumn frost around 12 Nov. 212 frost-free days.
Sowing windows for Norwich →Exeter
Safe to plant out from 16 May. First autumn frost around 6 Nov. 202 frost-free days.
Sowing windows for Exeter →York
Safe to plant out from 7 May. First autumn frost around 6 Nov. 204 frost-free days.
Sowing windows for York →More cities are added as readers ask. Sow-window planner for any postcode →
Frost warnings and sowing reminders
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