In our yard, we have a small white spruce seedling that was originally planted about 6 feet from the drip line of a large, 10-foot-tall white spruce. Years later, now we know we planted the small spruce too close because now the small one is about 4 feet tall and the large one is about 15 feet tall, and there is only about two feet of empty space between them. Because the larger spruce's branches grow about 9-12 inches a year, it will only be about two years before they are touching each other.
Will the big spruce eventually overgrow and kill the smaller spruce? Once the two trees' branches are touching, does that mean that their roots will also be touching and competing for the same nutrients -- with the big tree's roots ultimately winning the battle? Or is there a way to get them to grow up side by side, touching each other?
The reason I ask is because I know that on our other mature spruce trees, pine cones don't drop far from the mature trees, and seedlings are always sprouting out within a few feet of the mature trees. How do these natural seedlings grow up in nature, when they are growing only a few feet from the adult spruces?
We don't have a good spot in our yard to transplant the smaller spruce, so if there is a way that it can stay alive and grow up next to the bigger spruce, we'd prefer to keep it where it is.
Any advice?