annie_in_the_ pnw, after further looking I could see you fishing line. My opinion is that the deer, especially the young, can easily pass through or under your line.
I use deer netting to protect selected plants. Deer netting, also sold as bird netting but in different heights and lengths, is a black nylon netting made into about 3/4" squares--available at Big Box and many nurseries/local hardware stores.
For my dogwood, I hang the netting directly to the tree from its branches and let the end drag on the ground. (Do not try to save on netting, I use the total 7 feet without regard to how high I attach it to the tree); as the tree grows, about every 3-4 months, I remove the netting and then replace it atop of the new growth. In the winter, after the tree looses all leaves, I remove the netting. I replace the netting in spring. This works for me.
My neighbors dogwoods show deer munching, mine do not--I do note the disappearance of dogwood fruits from the ground around the tree.
You should include what city and USDA zone you are located in, brings help and comments from locals.