Plants are talking to each other down there, passing messages through fungal threads
Beneath every forest and field, plants have been exchanging information through fungal threads, chemical signals, and electrical impulses for hundreds of millions of years — a living internet that predates our own by an almost incomprehensible margin. Now, armed with artificial intelligence and electrophysiological sensors, scientists at institutions like Edge Hill University are beginning to decode these ancient conversations, opening new possibilities for sustainable agriculture and ecosystem restoration. The urgency is real: the same chemical pesticides, deforestation, and climate pressures that drive the need for better farming are quietly severing the very networks that make plants — and by extension, us — resilient.
- Plants are not passive organisms — they warn neighbors of pests, share nutrients across species, and coordinate defenses through a fungal underground network connecting over 80% of Earth's plant life.
- AI and sensor technology have crossed a threshold: scientists can now insert electrical probes into crops to read real-time signals about water stress, nutrient deficiencies, and photosynthetic performance before any visible symptoms appear.
- Researchers have already sent signals from mobile phones to trigger physical responses in plants like the Venus flytrap, suggesting that two-way communication between humans and plants is no longer purely theoretical.
- The same industrial and environmental pressures demanding higher crop yields are destroying the fungal networks that make plants naturally resilient, creating a compounding vulnerability in global ecosystems.
- The race is now between our growing ability to listen to plants and our continued habits of silencing the underground systems they depend on for survival.
Beneath nearly every garden and forest lies a network that predates the internet by millions of years. Plants communicate through fungal threads, electrical pulses, and chemical signals — and for decades, the idea that this constituted genuine communication seemed like science fiction. Now, artificial intelligence and new sensor technology are allowing scientists to listen in.
Dr. Sven Batke of Edge Hill University calls this the plant-wide web. When grass is cut, damaged plants release volatile chemicals that prompt neighbors to strengthen their defenses. Below ground, a fungal network known as the wood wide web connects over 80% of Earth's plants, allowing trees to share water, nutrients, and warnings about pests across vast distances. The system has been operating for hundreds of millions of years.
What has changed is our capacity to read it. Using electrophysiology — the study of electrical signals in living organisms — researchers now insert tiny probes into plants to monitor how those signals correlate with water transport, nutrient uptake, and photosynthesis. Some scientists have even used mobile phones to trigger responses in Venus flytraps. In agriculture, this translates to greenhouses that respond to what plants are actually signaling rather than fixed schedules — detecting deficiencies and preventing failures before they become visible.
Yet the networks enabling this resilience are fragile. Chemical pesticides, deforestation, and climate change can sever the fungal connections plants depend on, leaving them isolated and less able to mount coordinated defenses. Ecosystems weaken; landscapes become harder to restore.
Batke's parallel is pointed: we teach children to read because literacy opens the world. We should be equally deliberate about preserving the communication systems plants rely on. As AI gives us the tools to decode plant language, it also hands us a responsibility — to listen carefully, and to avoid silencing conversations that have been sustaining life on Earth far longer than we have.
Beneath the soil of nearly every garden and forest lies a vast, ancient network—one that predates the internet by millions of years. Plants are talking to each other down there, passing messages through fungal threads, electrical pulses, and chemical signals. For decades, this idea seemed like science fiction. Now, with artificial intelligence and new sensor technology, scientists are beginning to listen in on conversations that could reshape how we grow food, restore damaged ecosystems, and understand the living world beneath our feet.
Dr. Sven Batke, a plant scientist at Edge Hill University, describes this underground communication system as the plant-wide web—a network as intricate and essential as the internet is to human civilization. The comparison is apt. Just as we rely on networks to share information and coordinate action, plants use multiple channels to stay connected. When grass is cut, the damaged plants release volatile chemicals into the air, signaling nearby plants to strengthen their defenses against the threat. But that's only the surface. The real complexity lies below ground, where a fungal network known as the wood wide web connects over 80 percent of plants on Earth. Through these fungal threads, trees and plants exchange water, nutrients, and information. Older trees can support younger ones. Plants warn each other about pests and disease. The system is so effective that it has been operating for hundreds of millions of years.
What's changed recently is our ability to read these signals. Electrophysiology—the study of how electrical signals move through and between plants—has accelerated dramatically thanks to advances in artificial intelligence and sensor technology. Researchers now insert tiny electrical probes, similar to acupuncture needles, into plants to measure how electrical signals correlate with plant performance: water transport, nutrient uptake, photosynthesis. Some scientists have even sent electrical signals from mobile phones to trigger basic plant responses, like opening or closing the leaves of a Venus flytrap. These aren't parlor tricks. They're the first steps toward a practical translation of plant language.
The applications are already emerging in modern agriculture. By monitoring electrical signals in crops, scientists can optimize watering schedules, detect nutritional deficiencies before they become visible, and potentially prevent crop failures. Imagine a greenhouse that doesn't rely on guesswork or rigid schedules, but instead listens to what the plants themselves are signaling about their needs. That future is closer than most people realize.
But there's a darker side to this story. The very networks that make plants resilient are fragile. Soil disruption from chemical pesticides, deforestation, and climate change can damage or sever the fungal connections that plants depend on. When these networks break down, plants lose access to the information and resources their neighbors would normally provide. They become isolated, less able to mount coordinated defenses, more vulnerable to stress. The consequences ripple outward: weakened ecosystems, harder-to-restore landscapes, reduced crop resilience. Scientists are only beginning to understand the full scope of what happens when we disconnect the plant-wide web.
The parallel Batke draws is instructive. We teach children to read because literacy opens the world to them. We should be equally careful to preserve the communication networks that plants depend on for survival. Our own survival is bound up with theirs. As AI tools give us the ability to decode plant signals, we're gaining not just scientific knowledge but a kind of responsibility—to listen carefully, and to avoid silencing conversations that have been sustaining life on Earth far longer than we have been here.
Notable Quotes
Plants use chemical signals, electrical impulses, and fungal networks to communicate with each other and share resources like water, nutrients, and information about threats.— Dr. Sven Batke, Edge Hill University
The Hearth Conversation Another angle on the story
Why does it matter that we're learning to read electrical signals in plants? Isn't that just academic curiosity?
It's practical. If you can measure what a plant is signaling electrically, you can respond to its actual needs instead of guessing. That means less water waste, fewer failed crops, better yields. But it goes deeper than that—it's about understanding that plants aren't passive. They're constantly communicating, and we've been ignoring that conversation.
The source mentions the wood wide web connecting 80 percent of plants. That's a staggering number. How does that network actually work?
Fungal threads grow through the soil and attach to plant roots. The plant feeds the fungus sugars from photosynthesis. In return, the fungus extends the plant's reach, bringing in water and nutrients from far away. But it's also a communication channel—plants can send chemical and electrical signals through those fungal connections to warn neighbors about threats.
So if we disrupt the soil—with chemicals, deforestation, whatever—we're essentially cutting the cables?
Exactly. And we don't fully understand yet what that disconnection does to plant resilience. We know it matters. We know plants behave differently when they're isolated from their fungal networks. But the research is still early. We're only now developing the tools to measure the damage.
The article mentions researchers sending signals from phones to make Venus flytraps open and close. Is that just a proof of concept, or could it become something more?
Right now it's proof that we can influence plant behavior electrically. But the real application is monitoring and optimization in agriculture. Imagine a greenhouse that doesn't need a human checking soil moisture every day—it listens to what the plants are telling it electrically and adjusts automatically.
What worries you most about all this?
That we're learning to read plant language just as we're destroying the networks that make that language possible. We're gaining the ability to understand them at the exact moment we're disconnecting them from each other.