have an established pseudopanax that recently started to drop a
tremendous amount of leaf clusters. If you trace the five leaves
back to the stem that is attached to the main branch then you
see that the connecting point has browned off and is very easily
pushed off the plant. No other trees/shrubs seem to be suffering
in any way. Is there anything I can do to save this tree?
species and cultivars are not attacked by much occasionally
the leaves get chewed by insects or spotted by fungi. When whole
leaves drop off, however, it indicates there may be a problem under
the soil. One thing that many New Zealand natives really hate
is to have "wet feet". Poor drainage and wet, humid conditions
encourage root rots, which unfortunately are usually fatal.
There is not a lot you
can do to treat a root rot condition, but if the tree does not recover,
you should consider removing it. To prevent a reoccurrence,
you will need to look at your soil structure. If you have
nasty sticky clay, you may want to consider putting in some drainage.
Other things which will help include organic matter (compost, peat,
etc.), sand and gypsum (generally what is found in commercial "clay-destroying"
by Dr Dan Blanchon from Unitec's Diploma in Sustainable Horticulture and Bachelor
of Resource Management.
with permission from NZOOM Home and Garden content,
from the previous
The views expressed here are not necessarily those of the RNZIH