Water the tomato and marigold deeply. Thin the marigolds when they’re 2 to 3 inches (5-7.6 cm.) Note: You can also plant marigold seeds around and between tomato plants, as marigold seeds germinate quickly. Plant the marigold in the prepared hole. We set out and describe all 4 types plus explain how to grow them and their many benefits. Not all marigolds are created equal. The marigold variety that delivers health benefits is calendula. Growing marigolds offers all sorts of benefits to you and your garden, so they should be considered when planning your yearly landscape. Not only are the spectacular when growing in a bunch, but they also bring along the enormous benefits in protection that have been highlighted throughout our earlier discussion. The flowers of the calendula marigold have been used for centuries for their health benefits 1. Again the French Marigold is the best bet but the Mexican Marigold and be extremely helpful too. Marigold Flowers: 7 Reasons You Should Grow Marigolds This Year. Benefits of Marigolds in the Landscape. tall to prevent overcrowding. Nematode control – The roots and stems of marigolds emit a chemical that may suppress the population of root-knot nematodes, tiny soilborne worms that feed on the roots of ornamental plants and vegetables.It appears that French marigolds, particularly the ‘Tangerine’ variety, are most effective against the destructive pests. The marigolds will help these veggies deter beetles, slugs leaf hoppers, bean beetles and the dreaded horn worms. Marigolds in the vegetable garden is a companion plant to bush beans, potatoes, Chinese cabbage, broccoli, squash, eggplant and kale. Moreover, marigolds also refer to the genus Calendula, which is a pot marigold and unrelated plants of a different genus. The marigold is a beautiful small flower that is wildly popular in North America. Continue to plant as many marigolds as you like. Look below at the 7 reasons you should grow marigolds this year and see why these colorful flowers are a must have for any yard. There are several species, includes French marigolds (t.patula) and African marigolds (T. erecta), which you can grow as garden ornaments, and most … The National Institutes of Health explains that the marigold you find in most home gardens is of the tagetes variety, which are purely ornamental 1. Ease of care and a long blooming season top the list of advantages of growing marigolds. ... French marigold varieties are thought to be best for this purpose. What you may not know is that there are 4 different types of marigolds. The French variety of this flower is part of the shorter family of marigolds.