By Curlytop60
Lancashire,
United Kingdom 
how far do the roots spread on a leylandii
20 Jun, 2010
Answers
At least as large as its canopy.
20 Jun, 2010
Possibly three times as wide as the canopy, in my experience.
21 Jun, 2010
Many thanks, it's worse tan I thought!!!
21 Jun, 2010
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Far too far! Several feet from the trunks of the trees.
20 Jun, 2010