I wonder what advantage they get, as you say it is not following the sun, plenty of plants do that. Bit of a prickly problem (Sorry)
Not following anything as far as we can see, except each other
Okay - they're alive - and amazingly mobile? Quite a momentous discovery. When they develop feet let me know. I was hoping someone knew how to relocate cacti without being lanced by them.
They've grown arms since I planted them so feet aren't out of the question
I did a video on moving a bigger cactus a while back -
Hope this helps
An interesting phenomenon Zigs.
I wonder if there are other plants apart from cacti, that move in a similar way?
There are other plants that move, bean plants have cells that grow more on one side than the other to make them curl round things as they grow, likewise Ivy Leaved Toadflax curls round to place seed pods into crevices but both of these result in permanent changes to the plant stems which this obviously doesn't as they revert to the previous positions.
I've heard back from the editor of CactusWorld, who has agreed to publish my article in the March edition of the magazine
The editor has seen these plants in habitat up a mountain in Argentina, and thinks that as they live in much cooler conditions than most cacti, they might be moving to try and find a cooler place in the greenhouse.
I can test this theory next year by introducing a fan into a timelapse. The drop in temperature will be recorded by the digital read out at the bottom of the video so we could see if they like it