at about 15 feet tall.. mine are at least 10 feet wide.. in full sun.. .

using the full latin name.... pix below ....

ken

https://www.google.com/search?q=thuja+standishii+x+plicata+%27green+giant%27&biw=940&bih=745&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjCucuk1bHNAhVkxoMKHbjGCCMQ_AUIBygC&dpr=0.9

Ken, thanks for the info, do you think I would be safe planting the trees 6 feet from my house? If yours are 15 feet and 10 feet wide then 6 feet of spacing should accommodate the plant all the way up to 20 feet I would think. The plants are currently 6 feet tall, zone 7, memphis TN, mostly sun/ afternoon sun. I will add a pic below if you can give me your thoughts. I am removing all the plants in the picture and planing on putting 4 or 5 green giants against the house in a line, then out in that island garden area I am going to plant a weeping blue atlas cedar. Any thoughts?

Green Giants will be totally out of scale with that house. Try using something slower,shorter and thinner like Thuja occidentals Degroots Spire.

Katsura, The whole point of using the green giants is because they grow fast and tall, "out of scale?" well the chimney in the picture is 30+ feet. The other side of the house has an oak tree that is 6 feet across at the base and prob 70 feet tall at least, but that is just a guess. I am trying to block the afternoon sun so I am looking for the large size. Here is another picture that may help. The yard to the right of the driveway is a neighbors so I cannot plant anything there, so all I have to work with is the area in front of the garage.

at about 15 feet tall.. mine are at least 10 feet wide

==>> it would follow.. that at 30 feet tall ... they might be 20 feet wide ...

i think you are fixated on the wrong plant.. as noted above ...

but if you have your heart set on it.. go for it ...you can remove them later.. or move.. and leave the problem to the next owner ...

ken

You wrote : "planting the trees 6 feet from my house". That will not permit any sun to the tree on your house side, and that foliage there probably will die.

Ken, I prob am fixated on the green giant, mostly beacuse of the growth rate and looks, however i found the plants on sale for a really good price, which is why I got them. So I guess try question is really not about "what type of plant" It is how far away from the house would you be comfortable with? As in not having to ever prune the bottom? Anyway, I have decided to put one out in the center of that garden island area, which is about 20 feet from the house and 20 feet from the driveway, surely that will never hit the house. So besides fertilizer and water is there anything in particular a beginner would need to know? What about a yearly insecticide treatment as a preventative measure?

Water only is required...and some cultivation first couple years

ron