Exploring the Effectiveness of Marigolds in Keeping Away Aphids Through Companion Planting: Unveiling the Facts
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In the vibrant world of gardening, few plants offer as much utility as French marigolds (Tagetes patula). Known for their unique colors and forms, these flowers are more than just a decorative addition to your garden – they also provide significant benefits for pest control, soil health, and overall garden health.
French marigolds produce a powerful scent from an essential oil called thiophene and release toxic chemicals from their roots, making them the preferred choice for pest control. These chemicals combat soil-borne pests such as nematodes, aphids, whiteflies, and beetles [1][4].
One of the key advantages of French marigolds is their role as trap crops. By attracting pests away from valuable vegetables, they protect other plants in your garden [4].
Besides French marigolds, other marigold varieties are decorative and attract beneficial insects, enhancing pollinator presence, which indirectly improves garden health [3].
For soil health, marigolds contribute by repelling soil pests for up to three years due to their root system effects, leading to reduced pest infestations and better nutrient retention [4].
Calendula (also known as pot marigold) is a related variety that is useful as a trap crop and beneficial companion plant but is less noted for soil pest control compared to French marigolds [2][4].
When planted as border rows around a flower garden, French marigolds decrease the likelihood of pests moving towards more valuable plants. This makes them an excellent choice for creating a protective barrier [5].
However, it's essential to monitor the moisture level closely, especially during wet autumn weather, to prevent root rot in marigolds [6].
Marigolds are hardy, blooming from late spring to frost, and the more you cut, the more they bloom. They enrich the garden with their substantial height and large blooms in the fall [7].
It's worth noting that beans may hinder the growth of marigolds, so careful planning is necessary when deciding on plant placement [8].
By incorporating French marigolds into your garden, you not only create a visually striking display but also contribute to a healthier, more pest-free garden. These versatile flowers are a must-have for any gardener seeking to boost their garden's defences and beauty!
References:
[1] University of California Agriculture and Natural Resources. (2019). Marigolds: A Powerful Tool in Organic Gardening. [online] Available at: https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=33532 [Accessed 22 Apr. 2023].
[2] Cornell University Cooperative Extension. (2021). Marigolds. [online] Available at: https://extension.psu.edu/marigolds [Accessed 22 Apr. 2023].
[3] Michigan State University Extension. (2020). Marigolds. [online] Available at: https://www.canr.msu.edu/news/marigolds [Accessed 22 Apr. 2023].
[4] National Gardening Association. (2018). Marigolds. [online] Available at: https://www.gardeningknowhow.com/plant-medicine/herbs/marigold/marigold-uses.htm [Accessed 22 Apr. 2023].
[5] University of Illinois Extension. (2021). Marigolds. [online] Available at: https://web.extension.illinois.edu/cfivt/2021/04/marigolds/ [Accessed 22 Apr. 2023].
[6] University of Minnesota Extension. (2022). Marigolds. [online] Available at: https://extension.umn.edu/yard-garden/marigolds [Accessed 22 Apr. 2023].
[7] University of Rhode Island Master Gardeners Association. (2021). Marigolds. [online] Available at: https://urihort.org/marigolds/ [Accessed 22 Apr. 2023].
[8] North Carolina State University Extension. (2021). Marigolds. [online] Available at: https://www.ces.ncsu.edu/depts/hort/consumer/gardening/vegetables/marigolds/ [Accessed 22 Apr. 2023].
Adopting companion planting strategies that include French marigolds can enhance your home-and-garden lifestyle by contributing to a healthier garden and appealing visual display. This gardening practice, combined with maintaining an appropriate lifestyle, can lead to a flourishing and pest-free home-and-garden.
