Help, we planted approx 30+ of the above conifers in January,just along both sides of the fence in the back garden,just to soften the look,But, the center of the foliage has gone a golden/yellow colour,but the external ones are a blue/green colour as purchased,inour extensive gardening book it does show a specimen that is golden,Are we about to loose them completely,or is this normal,soil is good, but below approx 10"- 12" is clay.