Planting green manure is simple: you choose species like crotalaria, mucuna, or millet, sow them in empty beds or between crops, let them grow until the beginning of flowering, cut them, and incorporate the green mass into the soil to increase nitrogen, organic matter, and protect the garden.<\/p>\n
If you feel your garden is always "tired," producing little even with store-bought fertilizer, green manure can turn the tables in just a few months. Let's see, step by step, which species to use, when to plant, and how to avoid mistakes that cause many people to give up unnecessarily.<\/p>\n
Green manure is a natural way to improve the soil by planting certain species that are then cut and mixed into the soil. Unlike chemical fertilizers, it uses living plants to enrich the soil for free, with roots that break up compacted soil and leaves that gradually release nutrients.<\/p>\n
In practice, imagine a small backyard garden in Belo Horizonte that starts using green manure in the winter. With crotalaria, the soil becomes more fertile, and in the spring the lettuce and chives grow healthy, without spending so much on purchased products. That's green manure in action.<\/p>\n
Research from Embrapa (2022) indicates that green manure increases soil organic matter and reduces the need for chemical fertilizers in commercial vegetable gardens. Therefore, if you want a sustainable result, it's worth testing on a small area first.<\/p>\n
Green manure differs from chemical manure because it is made from plants grown directly in the soil, without transportation or packaging. While chemical manure provides quick nutrients but can deplete the soil over time, green manure creates a natural cycle that improves soil structure and keeps beneficial bacteria alive.<\/p>\n
Other types, such as composting, come from already decaying organic waste mixed together after a period of decomposition. In contrast, green manure involves planting, growing, and incorporating it while the plant is alive, which accelerates the process for consistently growing gardens.<\/p>\n
Green manure brings nitrogen to the soil, helping plants like tomatoes and peppers grow strong. It also protects against erosion on rainy days, as the roots hold the soil and the leaves cover everything.<\/p>\n
To maintain a productive garden in the long term, these benefits mean fewer pests and diseases, since living soil naturally repels invaders. Finally, in explaining that green manure is one of the practices for recovering the soil and increasing biodiversity in the garden, I suggest reading more about regenerative gardening: Regenerative gardening: how to restore soil and increase biodiversity<\/a>.<\/p>\n Cover crops are ideal for Brazilian vegetable gardens because they adapt to the country's varied climate. They include groups such as legumes, which fix nitrogen, and grasses, which cover the soil quickly.<\/p>\n To choose, consider a vegetable garden in Campinas using a simple intercropping system of crotalaria and millet in an empty bed after the tomato harvest. This mix keeps the soil protected and rich, ready for the next planting.<\/p>\n Studies by Embrapa (2022) show that intercropping systems like sorghum plus crotalaria increase nitrogen for vegetables in the Cerrado. Thus, with the right choice, you gain efficiency without extra effort.<\/p>\n Legumes, such as crotalaria and mucuna, excel at bringing nitrogen from the air to the soil via bacteria in their roots. This nitrogen fixation helps vegetables develop green leaves and produce better fruit, without needing extra fertilizers.<\/p>\n In regions with light soil, such as in the Southeast, they grow easily and prevent the soil from becoming bare during the winter. In the second paragraph, when discussing choosing species with the long-term design of the garden system in mind, I provide the link as a reference for those who want to plan their garden in a more sustainable way: Permaculture Principles: Designing a Sustainable Garden<\/a>.<\/p>\n Grasses, such as millet and Sudan grass, create a thick green blanket that prevents weeds and breaks up hard soil with deep roots. Cruciferous plants, like black oats, release substances that kill nematodes, protecting the roots of vegetables.<\/p>\n In humid areas of the South, they are perfect for clay soils, keeping everything covered year-round. Together, they form an army against erosion.<\/p>\n Here is a table comparing groups of green manure plants, with their functions, indicated regions, and examples of species.<\/p>\nMain green manure plants for vegetable gardens in Brazil<\/h2>\n
Legumes: stars of nitrogen fixation<\/h3>\n
Grasses and cruciferous plants for cover crops and soil decompaction.<\/h3>\n