Answer: I am only offering an educated guess when trying to identify your hedge. It might be Golden Privet (Ligustrum x vicaryi). If so, this is a vase-shaped shrub that commonly grows 4 to 6 feet tall. Golden privet has bright yellow foliage when grown in full sun. Plants grown in the shade have yellow-green leaves. Golden privet is hardy in USDA hardiness zone 4.
If this is your plant, it may have reached its mature size. Pruning it back slightly each year as you have been doing will keep it full and encourage healthy new growth. You can't make it grow higher than its predetermined mature height, no matter how much you prune. Plants growing beneath your hedge should not hinder its growth. Enjoy your garden!
Q&A Library Searching Tips