There are massive Seabuckthorn
trees on the Bullock homestead on Orcas Island(Washington state).
There are sizable examples in the Spring Ridge Commons food forest near downtown Victoria.
At least the latter
should be solidly zone 8.
'Theoretically this level of creeping Orwellian dynamics should ramp up our awareness, but what happens instead is that each alert becomes less and less effective because we're incredibly stupid.' - Jerry Holkins