Plant of the Month
Spruces from around the World
Picea orientalis, omorika, engelmanii and rubens
Location: Grid N-33 south side of the barn
This is a new memorial planting, honoring David Wenny, retired CNR professor and Director of the Pitkin Forest Research Nursery (and Arboretum neighbor). It includes a species of Spruce tree from each of the four geographic regions included in the Arboretum. Picea orientalis from Asia, Picea omorika from Europe, Picea engelmanii from Western North America and Picea rubens from Eastern North America. A full sized cultivar is included for each species. Then, to help demonstrate the genetic diversity within a species, I included a dwarf cultivar for three of the species.
I intentionally picked somewhat less commonly seen species of spruce, just to showcase some more unusual trees. We do already have some of each of the species planted in their respective geographic areas, but all of the cultivars are new to the collections.
The goals of this planting are to serve as an introduction to the geographic basis of the Arboretum, to demonstrate the genetic diversity within a species and, several years down the road, to provide a windbreak for the Renfrew Shelter.
April was cold and wet, I am not sure how far behind flowering is now. I would say at least three weeks.
That has delayed some things like planting and herbicide spraying, and it might be the latest I have started mowing. However, there are still places in the Arboretum (especially down by the barn) that can really grow grass. We have probably mowed about half of the Arboretum once now — down by the barn, we have cut three times!
I am still not sure if the Forsythia have already reached their peak, or, if there is more to come. I am guessing that the sudden cold snap in February damaged a lot of buds, but they seem to still be getting a little more colorful every day (or that might just be that they look better in blue sky??).
Of all the work we do in the Arboretum, I think rechipping the paths might have the most immediate effect!
Arboretum Associates Annual Plant Sale
Download Plant Sale List (PDF)
Saturday, May 19th 9a.m. – 12p.m.
Rotary Ice Rink, Latah County Fairground