Korean pine (Pinus koraiensis) as a windbreak tree? Growth rate?
I think I've figured out how to set up a small windbreak in my backyard despite the fact that there is a powerline running along our northern property line. In addition to several smaller conifers that don't grow more than 25 ft (juniper and Techny arborvitae) I think I can work in 3 full-sized evergreens without sacrificing space from my vegetable garden. Since my goal is to create as much of an edible landscape as possible, I was considering planting Korean pine since they will eventually produce pine nuts.
What I'm wondering is what kind of growth rate I could see from them here in south-central Minnesota (borderline zone 4/5 based on the past 10 years' winter lows). Where would you recommend sourcing the plants from that won't break the bank? Finally, I've seen one source state that these trees require a soil innoculant to improve growth rates. Is this true, or just a sales pitch? Thanks!