They didn't produce much. By the end of the season, the brussel sprouts were barely 4 inches tall and no sprouts; the rhubarb, crowded out by the borage I planted to protect, didn't get to be much more than a few leaves--not the stalks of homegrown rhubarb for rhubarb crumble we imagined being able to have over the summer.
Once we did our final harvest, we sorta forgot about the rhubarb (as we were told to do, apparently you can neglect it and it will prosper) and the brussel sprouts. In the early spring, we discovered that our brussel sprouts not only made it through a very cold winter, but were growing!
After a few more weeks, we saw that the rhubarb, once a nub in the ground, was also now growing and producing magnificent leaves!
And then we went away to England for wedding stuffs and we discovered these upon our return. Both the rhubarb and the sprouts are flowering! The sprouts are also like 6 feet tall and we need to re-stake them. I am not sure what that means in terms of getting any produce from either plant, but we are pretty impressed with ourselves that we can harvest seeds from seeds we started.