From under the microscope Plants Are Not Vegetarians What a microscope keeps showing us about how roots really eat — and what we’ve quietly bred out of our seeds. It sounds like a provocation. But the longer we spend with soil under the microscope, the more literally we mean it. For most of the last century we pictured a root as a straw. Passive. Sipping dissolved minerals from the water around it, the way you draw lemonade through a paper tube. Nitrogen in, phosphorus in, potassium in — a plumbing problem, and one we learned to “solve” by pouring the missing elements into the ground in soluble form. That picture built modern agriculture. It also turns out to be, at best, half the story. The other half is stranger. It’s the part we want to tell you about. The root that farms its own food Start with the image most of us carry from school: the legume and its root nodules, little pink factories where bacteria pull nitrogen out of thin air and hand it to the plant. Beautiful, famous — and, it turns out, the loud exception rather than the rule. The quiet rule may be something else entirely. Researchers like James White at Rutgers have spent years describing a process they call the rhizophagy cycle — literally, root-eating. And it looks less like plumbing than like husbandry. Here is roughly how it goes. At the growing tip of a root, the plant leaks sugars, proteins and vitamins into the soil around it, and bacteria come to the table. The youngest root cells, right at the tip, haven’t hardened their walls yet — and the plant lets the bacteria in, into the narrow space between the cell wall and the living membrane. Once inside, the bacteria shed their own walls and go soft and naked. Then the plant does something that stops sounding like symbiosis and starts sounding like digestion: it hits them with a burst of reactive oxygen — superoxide, the same class of molecule your immune cells use to kill invaders — and the oxidation makes the microbes leak. The plant harvests what spills out: nitrogen, minerals, the things it needs. Not all of them are consumed. The survivors get pushed out toward the skin of the root, where they trigger a root hair to start elongating, and they ride that growing hair outward — rebuilding their walls with a little sugar the plant feeds them on the way — until they slip back out the tip into the soil. There they refill with nutrients, and the whole cycle starts again. A few go in. Because they multiply while they’re inside, more come back out than went in. And here’s the detail that stopped us: in White’s experiments, the root hair barely grows at all when the bacteria aren’t there. The hair and the microbe are not two things that happen to share space. The hair seems to be built for the traffic. The plant isn’t feeding on microbes the way a cow feeds on grass. It’s keeping a herd. It’s farming them. What we quietly bred out Now hold that next to a weed. A wild plant matures out in the open, exposed, colonised by whatever its ground and its neighbours throw at it. Whatever survives that gauntlet, it carries — often right into its seed, passed down to the next generation like an inheritance. The community stays intact. Our crop seed doesn’t work that way. We produce it clean. Uniform. Selected, generation after generation, for yield and for how the plant looks above ground — never once for the biology it carries below. And the evidence is starting to catch up with what that costs. Wild relatives of our crops, and the least-domesticated varieties we still have, tend to carry richer, more diverse microbial communities inside their seed than the polished modern lines bred from them. In maize, the ancient relatives from its center of origin carry endophytes that let them shrug off nitrogen-poor soil — precisely the trait we stopped selecting for the moment we started growing maize in a haze of cheap fertilizer. Breed a plant in abundance, and it forgets how to find its own. Breed it clean, and it travels without its crew. We gained uniformity. We can’t pretend we didn’t also give something up. We want to be honest here, because this is young science and we won’t dress it up. Nobody yet knows exactly which nutrients move through the rhizophagy cycle, or how much of a plant’s diet it really accounts for. Some reviews looking at domestication and the seed microbiome call the picture mixed, and they’re right to. This isn’t a finished story with a bow on it. But it lands on exactly what we keep seeing with our own eyes in the field. The first line of defence Because those internal microbes don’t only appear to feed the plant. They appear to defend it. Endophytes pulled from plants that survive brutal ground — desert species, plants growing in salt, plants rooted in metal-contaminated soil — have, in study after study, handed a measure of that toughness to ordinary crops when they’re reintroduced. Drought tolerance. Salt tolerance. The ability to keep growing where heavy metals would otherwise stall a plant cold. Read that again if you farm where we do. Drought and salt aren’t exotic stresses in the Mediterranean — they’re the forecast. They’re July. They’re the wind off the sea and the summer with no rain in it. The resilience we spend the whole season trying to buy in a sack, top up from a jug, spray on against the heat — a plant may already know how to build it, from the inside, when it still has the biology to do so. The thing we keep trying to purchase, the plant was doing on its own. When we let it. A plant is not an individual This is why, at Terranima, we’ve stopped thinking of

What If Health Began in the Soil? GreenRoots Festival returns to Badolato for its second edition — Saturday, 12 September 2026   Last year, a simple question brought people together on a Calabrian hillside: what makes a soil truly alive?This September, GreenRoots Festival comes back to Badolato (CZ) for its second edition, and this time the question grows roots that reach even further: From the life beneath our feet, to the life inside us, to the life we build together as a community. This second edition is made possible by the European Erasmus+ programme, whose support lets us keep the whole day open and completely free.  And there’s another change worth celebrating: this year the festival is led almost entirely by Terranima, joined by our guest Giorgia Liberati (Radici Connesse), an environmental engineer and soil-microscopy specialist.  What began as an experiment has become something our own community can now carry forward — and that, in itself, is a small act of regeneration. From compost to community The day moves from the hands-on and practical to the quietly profound. We begin with compost — learning to raise the microbes that bring soil to life — and follow that thread all the way to the connection between the health of the soil and our own health. Because the same invisible world that feeds a plant also lives inside us. And when the workshops end, the day doesn’t. This year we’re adding a new chapter: a moment of social regeneration. As the afternoon turns to evening, the wood-fired oven comes to life, music plays, and the courses give way to conversation. Other activities are still taking shape to round out the day — all part of the same idea: slowing down and enjoying one another’s company. Regenerating the soil, after all, also means regenerating our relationships — the ones we build over a shared meal, a good drink, and an unhurried talk under the open Calabrian sky. Because learning together is one thing. Growing together is another. Why Calabria, why Badolato Events like this matter everywhere — but they matter especially here. In Calabria, where so much land and talent are too often overlooked, a festival like GreenRoots does more than teach techniques. It brings people together, gives farmers and curious neighbours a reason to meet, and shows that innovation and care for the land can happen right here, at home. Little by little, we’d love for Badolato to become a reference point in the region for this kind of gathering — a place people associate with soil, learning, and community. Last year, folks came from all around, and many now link this festival with the town itself. That’s exactly the kind of root we want to grow: one that holds, and spreads. Diversity is resilience If there’s one lesson the soil teaches, it’s this: the healthiest ground is the most diverse. A soil rich in different forms of life is a soil that resists drought, disease, and shock. The same is true for us. Last year’s edition brought together an extraordinary mix of people — farmers, gardeners, first-time composters, health and wellness professionals, young and old. That diversity was the festival’s real success. And it’s more than a nice image: diversity is resilience, and resilience is how we build a future that’s more solid, stronger, richer, and better prepared for whatever comes. Join us GreenRoots Festival 2026 is free, but places are limited and registration is required. Everything you need — the full programme, the day’s schedule, and how to sign up — is on the festival page: → Programme & registration — GreenRoots Festival 2026 Curious how it all began? Take a look back at last year’s first edition. See you in Badolato on Saturday, 12 September. Bring your curiosity — we’ll bring the compost, the music, and the wood-fired oven.