When do I trim my orange blossom bush?
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They should be pruned right after blooms have faded, so you do not accidentally cut off next year’s flowers. Since mock orange blooms in late spring to early summer, they are usually cut back once a year in late May or June.
Any blooming bush, hedge, and such is cut after the blossoms have faded/died. Not for fruit bearing bushes and trees because it is from these that fruits develops. One of the things you might find exceedingly helpful is knowing your zone number for growing plants. Probably even more helpful, is going online to whichever is your and grant college/university because the school will have a plant and garden website with all sorts of information sheets you can read and print. Example: in NC, the site is with NC State University and in SC it is Clemson University. Usually the site is Home and Gardens or some such. Shoshana gave you excellent advice! Oh, yes, and one does not cut greenery from flowering plants like irises or daffodils...those leaves make the food for next year's blooms!