Cold hardy! We harvest the main crop in mid-october and get side shoots until December.
Outstanding! I've been continuously harvesting LARGE heads of broccoli for several months now. The second and third harvests from these plants produced heads at least as large as the first harvest (it was like whole broccoli plants grew from the axillary buds after I harvested the terminal bud!). I fertilized twice, 2 weeks apart with organic fish emulsion early in the growth of these plants.
From Westcoast Seeds: A really nice head of broccoli in mid June followed by sprouts all year long - we are still picking them.