Germination temperatures
© Hotwells & District Allotments Ltd 2007-2018
Rough guide to temperatures of growing medium in which seed germinates.
Aubergine 21 C Beetroot 8 C Broad Beans 5 C Broccoli/Calabrese 10 – 15 C Brussels Sprouts 15 C Carrots 8 C Cauliflower 10 – 15 C Celeriac 15 – 18 C Cucumber 21 - 25 C in greenhouse Endive 18 C Fennel 10 – 30 C
French Bean 10 C in soil outdoors Leeks 7 C Lettuce 7 - 10 C Marrows/ Squash 18 C Melon 20 – 30 C Onion 10 C Parsnip 7 C Pea 5 C Peppers 10 C Runner Bean 10 C in soil outdoors Sweetcorn 10 – 13 C in soil outdoors Tomatoes 18 C