Where to plant Sprouts

It is probably a silly question, but.

I use a 5 bed rotation system; Potatoes  / Peas & Beans / Brassicas / Carrots, Parsnips, Shallots & Garlic / Other stuff.

Needless to say the Sprouts prevented preparing all the bed from being prepared for this years crop. Given that the Shallots and Garlic will be lifted June(ish) depending on the weather; could I plant the Sprouts in that space. Then when they are lifted I could plant later growing Brassicas in their place? I do not suffer from club root on the plot. (should I say yet?)

As I said it is probably a silly question, just a mad idea I came up with.

Cut off the bottom from the cut flower pots and twist them down into a space between your potatoes. When the sprouts need potting-on, just fill the pots with compost, soil or whatever and plant then up to their first or second leaf then really firm them in well with your fists. The pots will save you tying their stems to a cane and should be a lot more stable.