A lot of folks have trouble growing sweet peas, but they really aren't that hard. The trick is to get them in the ground no later than this week, so they will have plenty of cool weather to germinate in. They don't do well if planted any later, though once I had good results planting them as late as March 29.
My fingers get pretty sore nicking both ends of each seed with an emery board, to aid germination, before soaking them for 24 hours in lukewarm water, so last year I skipped that step, and I didn't think they did quite as well, but at least my fingertips weren't sore.
I just finished planting all of mine.
A tip: Purple and blue colored sweet peas are the most fragrant variety. Red ones are gorgeous but tend to fade in the sun.
There is a knee high kind that doesn't need a trellis to grow on.
Regular sweet peas grow nicely on a chicken wire fence.
The more you pick the blossoms once they start to bloom, the better they bloom.
They need lots of water in the summer.
