For a long time, Sweet Peas were my nemesis flower. When I first tried them, I'd been told they were easy (they were not) so I was not expecting to have any issues. Oh, I had issues! I direct sowed seeds and barely any germinated, those that did got promptly eaten by slugs. I then tried sowing indoors and had a huge amount of trouble with germination. I was just about ready to give up when I discovered the 'the wet paper towel in a zip lock bag' trick and I am here to share it with you in the hopes you can avoid all of my problems and grow the Sweet Peas of your dreams! 

Seeds should germinate within 3 - 4 days, sometimes quicker depending on the conditions. If the bag starts to deflate, I usually blow a little more air into it. I let my sprouts get to about 2cm and then plant straight into the garden. Once planted, make sure to cover your babies with something (I use cut up toilet rolls) as they will be a target of slugs and this is the best way to ensure they remain untouched and have the perfect start to life in your garden.