"Jonathon" wrote
I have a 4 year old Cordyline now exceeding 12 feet in height. What -
at the moment - is the likely root spread?

Another one is three yrs old and now exceeds six feet. What is its
likely root spread?

I ask because I have concerns over possible drain damage.

Mine seem to go straight down with only small fibrous roots radiating out
from the trunk.

--
Regards
Bob Hobden
just W. of London