A Brussel sprout plant can be harvested all through winter the first year, and a bit into march the second yoear. If you still have buds on right now, I would try to pick and eat them now.. When the plant starts to grow again after winter the second year it will focus on setting flowers.Click to see full answer. People also ask, are brussel sprouts a perennial?There are some useful vegetables that aren’t perennial but live longer than annuals. Examples of biennial vegetables include chard, beetroot, brussel sprouts, cabbage, cauliflower, celery, chard, collards, endive, kale, kohlrabi, leeks, onions, parsley, parsnip, rutabaga, salsify and turnips.Likewise, do brussel sprout plants regrow? Place as many Brussels sprouts you wish to regrow in the water. They shouldn’t be floating. It’s ok if the brussels sprouts are touching each other. Just make sure they aren’t crammed together. Also Know, do you have to replant brussel sprouts every year? There are gardeners who let their Brussel sprouts flower and go to seed in the second year to save seeds. They’ll continue t They’ll continue to harvest any sprouts left on the plant until the sprouts start elongating, getting ready to flower.Can brussel sprouts survive winter?Brussels sprouts can also be grown in USDA zones 4-7 but with harsher winters, but caring for Brussels sprouts in winter requires a greenhouse. They are a cool-season veggie and can withstand freezes for short periods of time, but sustained cold snaps and burial in snow won’t result in winter sprouts.