Tyee is a hybrid...I think I got it from Gurney's.
I soaked the sugar snap pea seeds in paper towels for 72 hours. I only intended to do it over night but that old cliche "Stuff Happens" changed my plans. About half had already sprouted by the time I planted them.
I don't do sweet peas anymore. I don't have the room to plant enough to make it worth while. Sugar Snaps (edible pods) are very sweet and the yield per square foot is excellent.