What do I feed my Norfork Pine with? I have had it for maybe 10 years and is about 6-7 ft tall. The tree has new growth on top and some of the lower branches are falling off, but there are no brown branches.
An all purpose 10-10-10 fertilizer will be fine. These are not picky, but you will want to use this at least once per year. This article will help you with the care of these: https://www.gardeningknowhow.com/houseplants/norfolk-pine/norfolk-dropping-branches.htm