Quercus greggii La Siberica strain
A fantastic and unique oak from a Sean Hogan seed collection at high elevation in Mexico, this oak has been fairly widely planted around Portland, though we could still use a few thousand more if it were up to us, and has proven itself easily cold hardy here and likely hardy in slightly colder climates. Like many high elevation Southwest and Mexican species, this oak loves our climate and where it grows as as smaller shrubby oak in its native habitat, it forms a small tree form in our richer soils. Lovely wooly texture on the leaves, this is an evergreen oak but will drop its leaves for a short time in April before flushing out new ones.
Latin Name: Quercus greggii
Site and Soil: 1/2 day to full sun and well-drained soil.
Hardiness: Hardy to at least 0F, possibly lower
Bearing Age: 2-3 years after planting
Size at Maturity: 20-35 ft. in height
Yield: 50+ lbs.
Pests & Diseases: Oaks are susceptible to Sudden Oak Death, a fungal disease that can kill entire stands of oaks, though we’ve not seen it yet in our area or on Silver Oaks
USDA Zone: at least Zone 7, possibly lower