Cornus kousa grows to be a big tree in Japan, though the one I've had
for about 35 years is not enormous. I have it under the wires coming
in to the house, and do a modest amount of pruning each year so it
doesn't touch the wires. Its branches go outwards, so I would not
consider it for a restricted area.
It does not get anthracnose, though both Eastern and Western natives
nearby did succumb, and not from being touched by anything mechanical
or metal.
It flowers a month later than C. nuttallii. The fruits are very
noticeable and have an interesting taste.
Elaeagnus umbellata is causing problems in some areas of the U.S.
Elaeagnus umbellata has the potential of becoming one of the most
troublesome adventive shrubs in the central and eastern United States
(Sternberg 1982). It exhibits prolific fruiting, rapid growth, is
widely disseminated by birds, and can easily adapt to many sites. It
is vigorous and competitive against native species, and resprouts
after cutting
--
Diane Whitehead Victoria, British Columbia, Canada
maritime zone 8
cool mediterranean climate (dry summer, rainy winter - 68 cm annually)
sandy soil