Germination temperatures

I found this table very useful but my carrots are taking an age to germinate right now, grrr.  I've sown some parsnips on paper towel in the propagator but they've all failed, double grrr.

Minimum Germination Temperature
21C/69F	Aubergine
8C/ 46F	Broad Bean
12C/ 53F	French Bean
12C/ 53F	Runner Bean
8C/ 46F	Beetroot
8C/ 46F	Broccoli / Calabrese
8C/ 46F	Brussels sprouts
8C/ 46F	Cabbage (summer)
8C/ 46F	Carrot
8C/ 46F	Cauliflower
10C/ 50F	Celeriac
10C/ 50F	Celery
18C/ 64F	Chili Peppers
8C/ 46F	Chinese cabbage
13C/ 55F	Courgette
13C/ 55F	Cucumber (Outdoor)
21C/ 70F	Cucumber (greenhouse)
8C/46F	Kale
8C/46F	Kohl Rabi
8C/46F	Leek
8C/46F	Lettuce
10C/50F	Mangetout
13C/ 55F	Marrow
8C/46F	Onion
8C/46F	Parsnip
8C/46F	Peas
18C/ 64F	Peppers (Sweet/ Capsicum)
8C/46F	Radish
8C/46F	Salsify
8C/46F	Spinach /Leaf beet
18C/ 64F	Squash/Pumpkin
8C/46F	Swede
12C/53F	Sweet corn
18C/64F	Tomatoes
8C/46F	Turnip