I was able to find the answer needed on an other forum.

I like the color... It still has the open appearance just like my 2' plant. But it's less noticeable and a little fuller since it's so much larger. It may fill in as the years pass. Where is this going anyhow? You said no wider than 4' in 5-7 years, but you didn't include the height. If that plant is 4' tall now, and it grows 6" a year... it should be close to 8' tall in the next 7 years. I'm not sure I would stick that plant in a 4' space next to a house. If you have room for this Pine, a much better selection and one of my all time favorites would be Pinus contorta 'Taylor's Sunburst'. You can't beat the 2-3 month show it puts on with the yellow flush. They both pretty much have the same 10 year size estimate (6' x 3'). The problem you have is that your tree is already large and it may fill your space very quick. If you got something smaller, it would take much longer for it to fill in.

Hi Dublin2, I don't really know anything about this plant but there are other genus with the name 'Secrest' and I believe that all of them originated at Secrest Arboretum in Wooster Ohio USA. My guess is that this is from there as well. I live about 30 minutes from there and I know most of the brooms that are there. I am not aware of this one. Maybe it is old or new but I would suspect this is the origin. Bill

I'll need to raise this tree soon. ==>>. crikey dude.. this tree aint worth that kind of labor ... with some selective pruning.. use it as an indoor xmas tree .. and go buy a new one ... its a species white pine.. not some rare foo foo one of a kind specimen tree ... are you really willing to put a couple hundred dollars of your labor into a tree that can replaced for 20 bucks??? besides .. riddle me this batman ...... after you spend a few hours digging the appropriate 3 foot ball of soil ... how in the heck are you going to lift it straight up a few feet.. to get more soil underneath??? work smart not hard ... its too big to be lifting without real equipment ... orrrr .. just ignore it.. it will die.. when it dies ... ken ps: i bought some strobus at wallyworld.. in sand in one gal pots .. one foot tall .... in early spring .. within 5 years ...they were about 15 feet tall .. and i had to cut them all down.. who knew pines grew so fast ... not the nimrod who planted them where he did.. lol ... and i had to cut them down.. because within another year or two. i would have had to pay to have them taken out ... as they were growing 3 to 5 feet per year .... i mean really.. look at what your leader did last year ... and the year before ...