How do plants communicate?

It is great to have you here! Plants have some absolutely mind-blowing ways of talking to one another, both through the air and deep underground.

To help us tailor this journey—whether you are looking for a casual, fun overview or a deep scientific dive—I would love to know: what brings you to learning about plant communication today, and how much prior biology background do you have?

I love gardening/nature and know some basic biology.

It is wonderful to have you here! Since you already love gardening and have some biology basics down, you are going to absolutely love discovering how the plants in your own yard are secretly chatting with each other.

Your path

Underground Fungal Networks (Mycorrhizal)

Electrical and Root Signaling

Ecosystem and Real-World Applications

The Symphony in the Air

When we step into a quiet garden, it feels like a place of absolute peace and silence. But in reality, your plants are constantly screaming, whispering, and gossiping through the air. They do this by releasing , or VOCs for short.

Think of VOCs as a plant's "scent vocabulary." You have actually experienced this yourself! That wonderful, nostalgic smell of freshly cut grass is actually a molecular scream for help. When lawnmower blades slice through grass tissue, the injured plants instantly release a burst of VOCs into the air to signal physical trauma.

How Plants Sound the Alarm

When a pest, like a hungry caterpillar, bites into a leaf, the damaged plant does not just suffer in silence. It synthesizes specific VOCs and sprays them into the wind. Neighboring plants "smell" these warning signals through tiny breathing pores on their own leaves called . Once they sniff the danger, they immediately start pumping bitter tannins and defensive toxins into their own leaves. By the time the caterpillars crawl over to the neighboring plant, the leaves taste terrible, halting the insect invasion in its tracks.

Airborne volatile organic compound signal transmission between two plants.

I have set up a quick visualization above so you can see exactly how this airborne alarm system operates between a wounded plant and its neighbor.