Many gardeners grow them amidst their vegetable crops as Marigold is considered to keep insects away.
Due to their pungent odor, Marigolds are considered the wonder-drug of the companion plant world. Some marigolds species like Tagetes (in both photos) produce a strong pesticidal chemical from their roots, that lasts years after the flowers are gone.

Marigold flowers often used in food industry for their nutritive qualities as well as for coloring of several culinary products.

3 comments:
Great macros.
Costas
Gorgeous color - I am planting my garden tomorrow!
Some years I grow these other years I don't. They are great little plants for keeping certain beasties away thats for sure. This year my colour scheme for the containers is pinks, whites, lilacs , purples, blues and cerise so I don't think I'll be buying any.
I love the little honey bee on the first photo. I have not been successful at getting a bee in focus in any of my photos yet.
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