K writes:

kerrygirl writes
Oh thank you Bud, that gives me hope. Do the same ones come back
every year or do you grow new ones ?

They are perennial, but many people discard them after the second year
because they may get a bit leggy, and it's so easy to grow new ones.

It's worth remembering they're brassicas and can suffer from things
like club root, so growing new ones and planting them out in different
places from year to year helps with that.

Anthony