Rose Cones for Winter Protection?
I live in zone 4b/5a and this summer I added some new zone-iffy conifers to my garden. These include Picea orientalis "Silver Seedling" and Abies nordmanniana "Golden Spreader". I usually just spray Wilt Pruf and burlap the iffy ones for the winter (from late November to late March), but was wondering if you thought that a Rose Cones would be better since they seem to be more insulated than just burlap? The only issue I might have with them if not getting enough air circulation...
Also, I see "Golden Spreader" listed as both zone 5 and 6 at different places. Does anyone know if this one is indeed a zone 5?
And lastly, last year some things that were supposed to be hardy for my area had some significant winter die-back. These include Abies concolor "Candicans", Picea abies "Vermont Gold" and Pinus leucodermis "Irish Bell". These were all bought from garden centers that get their stock from the Pacific Northwest. Do you think they died back so severely because they weren't used to Upper Midwest winters? Do you think that this winter they will come through better?
Thanks a lot,
Here is a link that might be useful: Rose Cones