I'd like to grow bunching onions in my garden near the Ocean in southern Brevard. After some research, I discovered that the kind I want is allium fistulosum. Dave's garden lists 7 varieties. Can anyone tell me, what variety is most likely to do best in my area, whether I should plant seeds or sets (do these even come as sets?), and can I plant now or would it be best to wait until spring? Can I just plant "green onions" from the grocery store? I admit I tried that and they died.