There are a
number of leaf spot diseases that can affect American holly, but
they usually affect the older leaves that will be shed anyway.
Tar spots on older leaves are considered by many plant
pathologists to be secondary invaders that take advantage of
senescing foliage. They are not thought to be damaging to
overall plant health.
Steps you can take to maintain the
health & vigor of American holly:
Rake up and
destroy or dispose of infected leaves. This removes the
causal organism from the site and can reduce the severity of
spotting in the future.
soil around your holly and fertilize and adjust soil pH
according to the results. American holly grows best in
well-drained, slightly acid soils with a preferred pH of
supplemental irrigation when we get into hot, dry summer
weather. Irrigation is best applied at the base of plants,
rather than overhead irrigation that wets the foliage.
to allow for good air circulation within the plant and sun
penetration into the interior. This allows the foliage to
dry quickly after rain or heavy dews.
Holly leaf spot
diseases are more common during wet spring weather, because
tender new growth is more susceptible to infection than older,
hardened off foliage. Fungicide applications are rarely
warranted in the landscape.
Holly ain't got no Holly berries?