How can we care for soil over winter?
Exploring green manure crops.
What if some of the most important crops we grow are the ones we never harvest?Green manure is a simple but powerful practice that puts soil health at the centre of growing.
Rather than growing crops for food or sale, green manure crops can be grown for the purpose of being returned to the earth and helping replenish nutrients.
At Pasteur Gardens, the Wolves Lane and Black Rootz growers have put rye grass into the beds as a green manure crop for the winter season. It is a reminder that sustainable growing is not only about what we take from the soil but also how we maintain our relationship with it.
What does it mean to feed the soil?
Healthy food starts with healthy soil, and that soil is a complex ecosystem containing organisms and organic matter that contribute to fertility and plant health. When crops are continually harvested without sufficient nutrients and organic matter being returned, these cycles can become depleted. The FAO identifies soil organic matter as central to soil structure, nutrient availability and water retention.
Green manure helps interrupt this cycle of extraction. As the crop grows, its roots and biomass contribute to the biological life of the soil. When that plant material is eventually returned to the ground, nutrients and organic matter can be recycled within the growing system. Rye grass specifically, has the the ability to capture excess nutrients and reduce nutrient loss through leaching.
Growing with the land
A period without a food crop does not necessarily mean that land has stopped being productive. Cover crops protect soil during gaps between growing seasons through erosion reduction and helping maintain soil structure. The presence of living roots instead of leaving completely bare reduces the vulnerability to environmental pressures.
The rye grass growing at Pasteur Gardens is therefore part of a longer-term cycle rather than a pause in production. Instead of asking only what the land can produce now, green manure asks what conditions we need to create for the land to remain productive in the future. We feel this shift is important within sustainability conversations because it moves us away from a purely extractive understanding of agricultural productivity.
What does this have to do with land sovereignty?
Land sovereignty connects closely with agroecology, which the FAO describes as an approach bringing ecological principles together with practical, local knowledge. Green manure might seem like a small growing practice, but it forms part of a much larger conversation about the responsibilities we have to the land that sustains us.
At Wolves Lane, sustainable food systems are not simply about producing more food. We want to maintain the ecological foundations that make food production possible. In this context, caring for soil becomes part of that wider practice of stewardship.
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