Carrots and cabbage possibly if you can locate big enough containers. Brussels sprouts I think you will have a real problem with they grow to a metre in height and unless well bedded in won't produce a decent crop.

Thank you, I will try cabbage and carrots. do you know how big the container as to be? I don't know if I would have the room on my balcony.

I do hope that you are considering the weight of your tubs, plant boxes etc & whether the balcony is strong enough to take it, ( accidents with balconies, roof gardens etc are not unknown).

We wouldn’t do; if it was unsafe.

Use a size that works for you and grow what you can. Cabbages need around a foot of ground between them in both directions, carrots at least 4 inches. Unless you have a big balcony where you can house large containers with drainage and raised up off the balcony this is a non-starter.

Thank you for all your help. I'm going to give it a miss.

I think you are being very wise Mariansom