It's really confusing knowing when to sow, where to sow, unheated or in a propagator?
Each vegetable is different, and the seed packets are vague at best.
The list below just shows how little heat most things need to germinate ... personally I only give heat to veg from the
bottom set; everything else is grown in an unheated greenhouse or on a cool windowsill.
I've condensed a bit of the info below, in temp.order. You need to look at the full guide for optimum germination temps.Top Veg » Blog Archive » Germination Temperatures for Vegetables Minimum temp necessary for germination (°C)
lettuce 2
onion 2
parsnip 2
beetroot 4
broccoli/calabrese 4
cabbage 4
celery 4
carrot 4
cauliflower 4
parsley 4
pea 4
radish 4
broad bean - 5
kale 5
leek 7
swede 7
turnip 8
bean – french & runner 10
sweetcorn 10
celeriac 10
tomato 10
courgette 16
cucumber 16
aubergine 16
sweet pepper 16
pumpkin 16
chilli 18