Hybrid American Hollies
Waxy Coating - protection against salt and pollutants
The waxy coating on the foliage of Grace Hybrid
Hollies that is responsible for the extremely attractive
sheen, is also a protection against salts and pollutants.
All plants have limits as to the amounts of salts and pollution
they can tolerate before damage is shown. The Grace Hybrid
Hollies is an excellent choice in harsh conditions because
they have a higher tolerance in both categories.
Bulletin #14, published by
the Holly Society Of America explains that, "hollies
planted in the most polluted
areas have done well."
- "Hollies are among the few broad-leafed evergreens
which resist high levels of dirt and soot and flourish under
- "Hollies have been known to resist such air
pollutants as carbon monoxide and sulfur dioxide."
- "Hollies have been
found to withstand the intense heat of pavements
The Holly Society of America Also reports on the effect
of salt on holly"
"Holly has been proven to rate high
amount the ornamentals which are tolerant."
Gene Eisenbeiss, research horticulturist of the U.S. National
"We have observed no injury on any ilex which we can contribute
to air pollution."
Penn State University observed 0% of susceptibility by
American hollies when exposed to .25 ppm ozone for eight
hours. Many other trees studied recorded up to 80% susceptibility.