Beyond the crop: the role of medicinal and aromatic plants in soil carbon sequestration and nitrogen cycling.
Negahban M, Msaada K
Soil Health
Herbs you grow in your garden or see at the farmers' market may actually be quietly rebuilding the soil beneath them, making it richer, more carbon-storing, and more alive with beneficial microbes — meaning growing herbs isn't just good for your kitchen, it's good for the planet.
Medicinal and aromatic plants — think lavender, mint, rosemary, and echinacea — release special chemicals from their roots that attract and shape communities of beneficial soil microbes. These microbes help pull carbon out of the air and into the soil, and help convert nitrogen into forms plants can actually use. Scientists found that mixing these plants into farms and gardens, or planting them alongside trees, amplifies these soil-healing effects and could help fight climate change while reducing the need for chemical fertilizers.
Key Findings
Medicinal and aromatic plants release secondary metabolites (flavonoids, alkaloids, terpenoids, phenolics) that actively reshape soil microbial communities and boost enzymatic activity linked to nutrient cycling.
Intercropping and agroforestry systems using medicinal and aromatic plants enhance both carbon sequestration and nitrogen fixation while reducing allelopathic (plant self-poisoning) drawbacks.
Emerging technologies — including biochar, nanotechnology, and remote sensing — can amplify the soil benefits of medicinal and aromatic plants, with case studies across multiple regions showing restored degraded soils and reduced greenhouse gas emissions.
chevron_right Technical Summary
Medicinal and aromatic plants like lavender, mint, and basil do more than produce useful compounds — they actively improve soil health by feeding beneficial microbes, locking away carbon, and helping cycle nitrogen. This review shows they could be powerful tools for sustainable, climate-resilient farming.
Abstract Preview
Medicinal and aromatic plants (MAPs) play a critical yet underexplored role in enhancing soil functionality through their unique phytochemical interactions and ecological adaptability. This review ...
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