Do marigolds really protect vegetables from insects?

Marigolds have a long history of keeping harmful insects away from produce when they

are grown nearby. With one notable exception, no academic study has been

conducted to support the plant's insect-repelling claims, therefore this assertion

appears questionable. There is proof that marigolds release a substance into

the soil through their roots that may aid in the management of harmful nematodes.

However, deer and rabbits do appear to be repulsed by the strong scent of marigolds.

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