About 9 years ago, I planted about 150 speckled Alders out in the open. These trees now are mature, and have spread out wide. If you seen them when they are leafed out, you would see what great screens they are. Some of these have formed large thickets around them. The new saplings around them come in thick, creating a stem density like you get when you cut mature forest. "Long whips racing for light".
When this happens, the mature trees open up underneath. These open areas, are small, just as wide as the tree. These trees are easy to cut, and grow back like nothing I have seen. They adapt tp what environment they are in. Open areas, tall and wide and a good screen, when spaced at 8-10 feet. When they fill in from seed, its more like a re-growth seen when mature forest is cut. I should also point out, I have given away, sold or moved about 6,000 trees from my original trees. If I would not have done this, you would have a differnt environment. Regarding the two Large Alders that I show on the tour, "that have shaded areas underneath." Hundreds of seedlings have been removed all around those trees. That is why it is a bit open there.
I can't express how pleased I have been with these trees. I plant travelways and screens, bedding areas and have them working in 4-5 years. I tried to explain on my tours. I experienced slow growth of shrubs, it was taking forever to get "over the head cover for deer". Then I planted rows of Alder, spaced 15-25 foot wide through my dogwood. Wow, did it take off. Now these areas have tall visual screens subdividing them. You can't even notice the dogwood in many areas.
My land would not be the same without them. I have many great bedding areas, that are not much when you remove the Alder. Silky, Red osier dogwood, High Bush cranberry are all great shrubs. But it has been my experience it takes, 10-12 years to get the size I want. That will be even slower if you have heavy deer browse.
These trees grow fast anywhere, as long as it is not a high dry sand ridge. Growth speed isn't the issue, the issue is not everyone will have a surrounding environment where they spread fast like mine do. For starters, the seeds need to fall in areas where their is sun light, and have some moisture. My brother Terry was over and dug 200 from my land to plant on his place. He gets more every year. They are growing in hard clay ground. Nothing has grown for him like these. He has 7 year old Norway spruce 4-5 foot tall. He has not seen any evidence of them spreading yet. I have another good friend growing them just as fast in clay. There has been about 2,000 - 2,500 taken from my land this spring. We should see the results of these trees in a few years.