You could probably do it in your climate. Inthe UK we aim to be planting out the plants by June/July but you are milder than us. But have you got very big containers? Brussel sprouts can grow .75 to nearly a metre tall and you need quite a few plants to get a harvest worth having. For one person I'd say at least 6 plants to have several servings of sprouts throughout the winter.

Wow..i put mine out in April and they are HUGE already... I may have done that too early..ooops! Our first FREEZE isn't usually until mid Oct.

Frank, you did great -- in Michigan/Wisconsin you can plant anytime between April and about now -- the earlier the better, though, IMO -- you'll get bigger plants with more sprouts.

The only drawback to early planting is that they get really tall and then might fall over and rot some of the sprouts, so you might want to stake them up.

They should stand in the garden through about Thanksgiving time -- I've gone out many a Thanksgiving and picked frozen sprouts which were fine when thawed out and cooked.

Thanks, flora! I was thinking of planting them in the same containers I use for my cherry tomatoes. I think they will be big enough. I'm not thinking about harvest, I'm planting them only because I think they look funny and cute, and they would look good in the middle of the winter on my balcony:)

Last year I went to the nursery and bought their overgown sale price brussels sprouts and tansplanted them some time around now or later (mid July?). They did great. They kept growing (better?) after frost until things froze up. Even the cabbage worms attacking them lived through the frosts.

I don't know if it mattered but I really dosed them with liquid fertilizer upon transplant to help them root. I cut open the bound up rootball first.