"It's really easy to overlook the lines above your head when you're planting a eucalypt sapling or a small stand of juvenile bamboo, but it won't be long before those plants are causing real problems for the network," Mr Smallman added.
"Unfortunately, quite often people don't get to fully enjoy the trees they plant, or see them grow to maturity, because they have been planted beneath, or close to, powerlines, and have to be topped or cut down."
Unplanned planting could also be a safety issue, particularly where staff in orchards, in forests and on farms might have to work unnecessarily close to powerlines when the trees matured.
Top Energy's guideline is that any tree should be planted a distance from powerlines of at least twice the tree's expected mature growth height. Where trees are threatening to encroach on powerlines, property owners are advised to contact Top Energy for assistance and information.
Further information on keeping lines clear of trees, and property owners' responsibilities, can be found at www.topenergy.co.nz