Do marigolds really help combat garden pests?

While planting marigolds alongside vegetable beds is a common gardening practice, their actual effectiveness in deterring pests is often overstated, according to experts. Pest expert Juan Rezkas notes that while marigolds do possess pest-repelling qualities, their benefits are frequently misinterpreted.

Rezkas explains that in small plots, marigolds might deter certain insects, but their impact across an entire garden is minimal. Gardener Nicola Carpenter adds that the marigolds' strong aroma, while generally considered repellent, is not potent enough to keep ground pests like aphids or beetles away from the garden.

Experts suggest that marigolds are best suited as one layer of a multi-faceted pest control strategy. Planting them densely and combining them with other protective measures can slightly increase their efficacy. However, gardeners are advised to grow marigolds primarily for their aesthetic appeal rather than relying on them for complete pest protection.

For optimal growth, marigolds thrive in sunny locations and tolerate heat and drought well. They are not suited for shady areas, as this can hinder blooming and increase the risk of powdery mildew. While adaptable to various soil types, they perform best in moderately fertile, well-drained soil and can be grown in beds, raised beds, or containers.