Either will work as long as soil temp reaches 40F or less
If limited # of seed it might be safer to store in refrigtor free from mice, birds etc...

Yesterday I got hold a couple of cuttings of purple raspberries. They have fruits on them.Can anybody guide me as to how to propogate them?

Nyssaman,
I planted some seeds of PF raspberry in recylced plastic containers back in mid-April (didn't receive them until then) I simply left the containers outside, with the lids on, and they sprouted fine in about six weeks. They're growing like the proverbial weeds now. The containers were on the north side of the house, tight to the basement wall..I suspect that kept them cool enough to do the trick.