I agree with mostly being environmental. Cannabis does communicate though, and has extra senses that we haven't even begun to be able to comprehend. When planted directly into the earth, the plants\roots have access to a network of bacteria that literally link everything together, and act like wires for transmission of current. Same with fungal mycelium, which can help plants communicate to one another.
The plants can directly signal each other using bioacoustic ultrasonic sounds ("click click!") that are far above the range of human hearing. Especially when they get stressed. Maybe it's more than just the environment, and the plants use their leaves like transmitters or receivers..? It would make sense to me that two leafs that are close to being the same shapes would be more in tune to resonate with each other, and maybe a reason why they would all morph and throw out the same leaflet patterns.
Researchers have recorded and analyzed ultrasonic airborne sounds produced by plants under stress, revealing a new form of plant communication.
thedebrief.org
Sound is ubiquitous in nature. Recent evidence supports the notion that naturally occurring and artificially generated sound waves contribute to plant robust...
www.frontiersin.org
Plants have scientifically been shown to draw alternative sources of energy from other plants. Plants influence each other in many ways and they communicate through “nanomechanical oscillations” – vibrations on the tiniest atomic or molecular scale or as close as you can get to telepathic...
www.ecosnippets.com
A recent study and related commentaries have raised new interest in the phenomenon of ultrasonic sound production by plants exposed to stress, especia…
www.sciencedirect.com