50 acorns tied in a sack

Now there are 51



So what the hell does this mean anyway?

Did it refer to the 50 US states? Something about smuggling some drugs back to London? A penchant for oak trees?

(For the unawares, the phrase comes out of “The Ballad of John and Yoko”:

*Caught the early plane back to London
Fifty acorns tied in a sack
The men from the press
said we wish you successs
It’s good to have the both of you back *)

Sorry, let me try this again: According to legend, and “The Ballad of John & Yoko”, John Lennon had “50 acorns tied in a sack” for world leaders. What ever happened to these acorns. Where they planted? Eaten? Tossed out? Sold on E-Bay?