Hi David,
" talking about length......is it true that there are beans plants that can grow 5 meter tall? "
That Guinness Records book lists 14.1 meters as the record tallest bean plant. I guess some very sick underfed bean plants could be only 5 meters tall, but people laugh at them and call them "shortie".
I personally would not want to be the one who had to pick the beans from the top of a 14 meter bean plant. You would need a firetruck with one of those super tall extendable ladders.
ZM
