Brussels sprout seeds

Hi all, Is it to late to plant Brussels sprout seed as I forgot and I do like to have 4 or 5 plants.
If it is I will have to pop down to the garden center.
Reg

sorry old bean or should it be old brussel?  Its far too late to sow seed - as indicated you will have to pop off to the local emporium for some plants..... I do have some spare plants but they dont post very well....