Species name: Tagetes

Description:

Marigolds, native to North America, tropical America, and South America, are annual flowering plants that are red, orange, and yellow and part of the aster family. They have opposite leaves and bloom for almost the entire season but have a peak in summer and fall. It is a popular flower in gardens for its long blooming time and pest deterrent capabilities. 

Uses:

Marigolds can be used for dyeing due to their vibrant coloring. According to specialtyproduce.com marigolds are being studied for their possible benefits for eye health, especially their lutein content in order to prevent age-related macular degeneration. They are also being fed to chickens so that may produce eggs with naturally hued yolks that are bright yellow. Marigolds have much cultural significance, for example, in Mexico, they can be used in teas for healing as well as for decor for their Dia de Los Muertos celebration.

Friends:

Marigolds can be used as a companion for many other plants such as apple, apricot, beans, broccoli, brussel sprouts, cabbage, cauliflower, cherries, lettuce, mulberry, roses, and strawberries. 

https://www.specialtyproduce.com/produce/Marigold_Flowers_6604.php

https://www.britannica.com/plant/marigold