Vine movement towards support
I have a small recently rooted ivy plant. It's growing vertically, and I turn it once a week or so. Ok, I know the leaves move towards the window for light, the cells on the dark side get longer than the sunny side ones. I understand that wind movement and touching a plant 'causes'a sturdier stem- ? hormone stimulation.
I put a taller plant behind the ivy three weeks ago, and haven't turned the ivy since. The taller plant is 6 inches or so from the ivy. How did the ivy know to grow away from the light and over to the support that is 6" away? Air current changes? Electromagnetic fields? Intuition? Magic?
Just curious, and always looking to learn-