One thing about forsythia--you can get trimmings of it just after it blooms in the spring, then stick 6 inch pieces of it in the ground, and it takes off pretty easily.I am no expert by any means, but all along my front line of my property is a line of Forsythia hedge that in the two years I have owned this house, has swelled to over 6 ft. Of course, in Spring it is a burst of yellow, then moving onto a wonderful green hedge in summer and fall. It loses it's leaves very late, and even though it is only branches in the winter, they're very abundant and also interwoven so thick, I notice the deer can't get through it, and it still provides a very good privacy shield. We've enjoyed it so much, we planted a whole row along our back property where we lost some white pines and needed privacy from our back neighbors. They grow extremely fast. Some people manicure them for a very trimmed appearance, but we let our just go wild, and it's wonderful. They are also quite affordable.
MB