I am establishing a vegie garden, but have some very mature (20m)
Eucalypts near by. I am worried for two reasons: The Eucalypts will
send their roots over and take all the water they can get, and fill my
vegie patch with roots; and secondly having manures and other soil
improvements will hurt the eucalypts which have evolved in the
impoverished Australian soils.

How close can I grow a vegie patch to these impressive trees?