I've got some cabbages and they had some cabbage worms. I picked up the worms and put them outside my fence.
Can the worms smell their way back into my cabbages?
The cabbage worms will definitely find your cabbages. I don't know whether they do it using smell or sight but they will find it. That is the reason to put row cover on the brassicas to avoid any further damage. Before you put the row cover, go through the plants to make sure you have removed all the cabbage worms that are already there.