'Yellow Twig' is a pyramidal Japanese cedar that will thrive in either full sun or dark shade. In sun the new growth will be light green and the older foliage will be medium green. In shade the new growth will be more chartreuse, almost glowing, and the older foliage will be darker green. The name actually comes from the color of the stems of the new growth rather than the color of the foliage itself. Very fast growing when young, 'Yellow Twig' seems to slow down with age. The best plants I have seen were pruned some when young to thicken them up and then pretty much left alone.