I am determined to grow sweet peas this summer. I tried last year, but few seeds germinated & they hardly grew. The soil they were in is not the greatest. I will be improving the soil there, but only really top dressing as I have vines there that are doing well.My garden faces south & it gets very hot from 11-2 or 3. I would prefer to grow them up my large trellis privacy screen that covers one end of my deck. I have already bought seeds & could you tell me how to start them indoors. I also read that since they are so slow to germinate, to cut an end off with nail clippers & then soak them in water??? Plse also recommend a specific variety. I'm in Ottawa, which is zone 5a.
Also, do you know of a variety of climbing hydragena that would grow in full sun up the same privacy trellis and/or along my fence (also in the sun). Thanks for any suggestions.