Ask-a-Dave's-Gardener: Help with plant spacing, 0 by ABCNova

ABCNova wrote:
I just had several plants installed and am afraid the area will become overcrowded in a year or two. I had 3 Chindo Viburnums planted for screening, they are plant 6 feet apart. I had two limelight hydrangeas planted. One limelight is 5 feet from a Chindo and the second limelight is spaced 5 feet from the other. I also had two Diablo ninebark and two ruby spice summer sweet planted. I definitely think I need to quickly change the layout and remove some of the plants before it’s too late. Does anyone have any advice. The space between the deck and the fence is 10 feet and all plants along the fence line are planted 4 feet away from it. The area gets a ton of afternoon sun and dapple morning sun