We want to erect a privacy and sound-absorbing hedge on two sides of our corner lot. There are established older trees with roots covering most of the open areas, now planted in grass. The containers we would like to place for hedge plants would be in partial shade and we would want a variety that can grow to a dense hedge 6-8' high or more within 2-3 years if properly cared for, in containers placed over the existing roots We live near San Diego, CA, in La Mesa, about 10 miles from the ocean. Winters are mild, summers can get hot, into the 90's occasionally. Our question: what would be your recommendation for hedge-type shrubs or trees growing in containers and reaching 6-8' with a solid dense growth in 2-3 years to shield sound as much as possible? Would you recommend a container with a trellis for vines in place of a hedge shrub? Thanks very much!
Growing Hedge Shrubs in Containers
Certified GKH Gardening Expert
You may need something large such as 10-15 gallon containers, but I believe this can be done. Dolomitic lime, and wettable sulfur will be your bests friends with containers such as this. I would recommend Junipers, or other evergreens, as they will be better suited for containers, and the dense foliage would help drown out more sound.
Here is an article with more information: https://www.gardeningknowhow.com/ornamental/shrubs/shgen/evergreen-shrubs-for-privacy.htm