Question
I live in Michigan and I want to purchase Thujas trees for privacy. The soil on our property is sandy. Will the trees still grow and live as stated on the internet?

Answer
Yes you should have little problem growing thujas in Michigan but I would not expect the growth rate that it gets in parts of the US with a longer growing season. Ask you local nursery about it IF they stock it it will grow good there.
Thuja Green Giant will grow from 3 to 5 feet per year and will eventually grow to 50 feet or more with a fairly narrow spread. The color is a deep lustrous green and is pleasantly fragrant.

Thuja Green Giant  will grow in a wide range of soils in zones 5 to 8 and prefers a deep well drained fertile soil although it adapts well to frequently saturated clay soils. This is a tough tree and will not easily suffer damage from high wind or heavy ice and snow loads.  

Thuja Green Giant is drought tolerant after it is well established, exhibits no significant pest or disease problems, is deer and bagworm resistant and is hardy to -25F.