Will marigolds stop cabbage worms from attacking cabbage? This was a hot topic last week as the Facebook post shown below made the rounds in many gardening groups, everything from local Canadian groups, to Gardening in Western Australia. Through this one post, thousands, if not hundreds of thousands of gardeners are now convinced that marigolds stop cabbage worms.
That is too bad, since this may just be another myth that has no scientific basis.
In this post I will discuss why you should have been very skeptical when you first saw this post, and then I’ll look at the real science behind the claim.