Underwire trees are ones that can be easily kept out
of the primary distribution lines.
The best are those that grow only to 25-30' and so never need utility
pruning at all.
Why does it matter?
Choosing the right trees for underwire planting brings:
greater safety by eliminating the possibility of climbing
into the wires
lower maintenance costs from frequent pruning and power
outages
more reliability on uninterrupted electric service to customers
fewer potential hazards from repeated wounding and subsequent
decay
no misshapen trees from topping, one-sided cuts, or center
removal
Set-back planting--placing public trees back from the right-of-way
onto private property--is another option.
Japanese tree lilac
planted beneath power lines
What are some good species for a northeast US urban environment?
Examples of trees suitable for underwire use include:
Hedge maple (Acer campestre)
Robin Hill serviceberry (Amelanchier x grandiflora 'Robin
Hill')
Winter King hawthorn (Crataegus viridis 'Winter King')
Goldenrain tree (Koelreuteria paniculata)
Amur Maackia (Maackia amurensis)
Professor Sprenger crabapple (Malus 'Professor Sprenger')
Hophornbeam (Ostrya virginiana)
Ivory Silk tree lilac (Syringa reticulata 'Ivory Silk')
Check the cultural requirements of these trees before selecting
them for your site.
What varieties should be avoided for underwire planting?
Any medium or large tree that will grow quickly into the wires.
Trees that require high maintenance, like many crabapples and cherries.
Where can I buy the recommended species?
Some are available at good regional nurseries, but check them against
your stock specifications.
Otherwise, order from the catalogue of a reputable tree nursery,
best 6 months in advance.
Where can I get more information?
Check with your local utility for its list, and with your land-grant institution's
urban forestry personnel. For other information, advice and help on
this topic, call offices of your State Urban Forestry Coordinator or University
Extension service, or visit urban forestry web sites.