"George.com" wrote in
:

I have been growing pottatoes in tyres for some weeks now.
One stack died off, 3 are still going and I pulled one up
today expecting a crop of new potatoes. The stack was 6
tryes high, I got a measly handful of potatos. Bugger.

how many weeks? did you dig up the one that died off? did you
dig up the one that you thought should have new potatoes or
did you literally "pull it up"?
lee