Medium to tall screening in a smaller area.
We need to replace four Leyland Cypresses. Area receives minimal sun. Three evergreens we are considering: Red Oak Leaf Holly, Thuja Occidentalis Emerald Green, Thuja Steeple Chase. How much will they grow in a year's time, do we need to worry about deer and disease. Thank you.
Howard County Maryland
How fast your trees will grow will depend on their growing conditions. Water is critical. Be sure their roots are moist--not soggy all the time, but at least as damp as a wrung-out sponge. Especially watch the weather and supplement rainfall in dry periods. In Maryland, we can have dry spells in spring and fall as well as summer.
Deer will eat arborvitae (Thuja). They will also often eat young tender plants until they get some size to them. You'll probably want to put wire fencing around them (not tight) until they get larger.
All plants are susceptible to some kind of diseases when they are weak. Try to keep them as healthy as possible. Fertilizer is not necessary, but spread some compost or soil amendment around it yearly if you like.