Spruce, Larch, and in my opinion Doug Firs need to be pinched in spring. See there ya go, there's that word again; "Pinched". In this case it cannot be done with scissors because it really does depend on snapping the new growth off at a weak point as opposed to cutting it off and leaving a tip to brown. In the spring the three mentioned species put fort the initial growth from the bud with something that looks more like an artist's paint brush. Then it will do a lot like a Pine, it will expand and elongate but the needles are present and not emerging as in a Pine. So while the new growth is in the paint brush stage you pinch it, or more precisely, break it off cleanly at a point above where the new growth begins. The new growth extends into the paint brush stage usually about an inch or two in length; it is supported at the base with the thumb and index finger of one hand and the end is grasped between the thumb and index finger of the opposing hand, making sure that you are not holding needles attached to the portion of the growth that is to remain, and it is pulled straight out. Sometimes you will get a needle or two as mentioned previously that will tear and leave a couple of brown needles that will in a couple of weeks fall away. However if you do this at the right time the new growth snaps off like fresh vegetables. If you wait too long they tear. In a couple of weeks new buds will develop below the point where the new growth began in the spring. Results with Larch can be really spectacular.