I had a 8 foot Blue Spruce that was actually blue. It was in danger of being overtaken bay two white pines so I paid $$$ to have it moved 50 feet to a more open area of the yard. However, since I moved it, it is no longer blue! Is there a fertilization schedule/process that I need to follow to bake my spruce blue again? What makes them blue in one area and green 50 feet away? Tedf44901@aol.com
Hi Ted: I've had it happen to me whereby I moved a 'Bakeri' Blue Spruce from one location in our next door neighbor's yard to another part of the same yard and lost the blue needles. The loss of the blue color was only temporary as in 3 years the blue color was back and stronger than before the tree was moved. I've also seen the reverse happen with another 'Bakeri' also in the that the tree had a strong green cast to the needles for about 8 years in the ground, moved the tree along side a 'Hoopsi' and a 'Koster' Spruce and lo and behold about 3 years later the tree turned blue, rivaling the 'Hoopsi' in color. One explanation as to why one tree did one thing is so much easier to respond to as far as why the tree went from blue to green. The other of going from green to blue is not so simple at all. It used to be thought that when we moved a tree from one location to another that the trees roots would find a new source of Nitrogen that had become somewhat depleted where the tree was first located. We do not want to overly fertilize Spruce with medium to high doses of Nitrogen anyway as we will lose the shape and we risk losing the brilliance of the color to the needles. In your case it seems to me that the tree may indeed have found a location in which the roots have found a richer source of nutrients in the ground. Give the tree a couple of years and then you should see the blue coloring come back. I know it worked for me with my 'Thomsen' and 'Moerheim' selections in which soon after they were planted in the ground they had a noticeable green cast to their needles and a few years later developed the color that I had hoped for. I would not fertilize at any time with a strong dose of Nitrogen. For the Winter I will give my trees a 0-10-10 sprinkled in a circle about 2 feet from their trunks. My plants do very well for me with no Nitrogen application at all. Jim