If you ’ve been heartbroken by the loss of a hemlock Sir Herbert Beerbohm Tree ( Tsugaspp . and cvs . , Zones 3–8 ) towoolly adelgid , you ’re not alone . Researchers at theU.S. National Arboretumhave been working for ten on get cross that are woolly adelgid immune , with achiever originating from a controlled hybridizing made in 1992 between the susceptible native Carolina hemlock ( T. caroliniana ) and resistant Chinese California fern ( T. chinensis ) . The first cultivar being release to the gardening craft is ‘ Traveler ’ , which matures into a striking specimen tree diagram and can also be used to produce a great informal screen . There is also a second similar cultivar being released named ‘ Crossroads . ’ While neither is usable to consumers yet , keep an eye out for them . They will be biz changers for hemlock lovers in Zones 6 and 7 .
‘Traveler’ hemlock
Tsuga‘Traveler’
Zones:6–7
Size:30 feet tall and 18 foot wide of the mark
Conditions : Full Lord’s Day to partial shade ; moist , well - drained soil
Native reach : cross
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Photo: courtesy of Susan Bentz, USDA—Agricultural Research Service
