معلومـــــــات غريبة عن التمـر

I know most of them except the last one
I understood all of them but what about the last sentence..what about that kind of palm trees that die by the death of his/her owner ?!!
How's that ?!!
If you have any reliable source for that info ; I hope you pass it to me and if you have any related info to that sentence ; I wish you write it down as I can't believe it

Sorry for the Interruption
Thanks in Advance

يعطيك الف الف الف عافية
والله استمتعت كثير بموضوعك
الف شكر لك يالغلا...!