An ideal hedge for screening

Q. We have a hedge of Choisya ternata (Mexican orange blossom). The hedge is about 12 years old, and still looking very lovely. It’s the nicest hedge we’ve ever had, and we’d like to keep it that way. Is there anything we should be doing to maintain the hedge in good health? What fertilizer do you recommend?
A. Their beautiful evergreen foliage and fragrant spring flowers make Choisya ternata plants ideal for hedges and screening. I saw a wonderful choisya hedge once, in a form