I have an overgrown Mock orange bush that's probably well over 50 years old. The base of the bush where the branches are coming out of the ground is about a 4 foot circle now. I cut it with hedge clippers back to about 6 feet high and wide in the fall each year. I'd like to "thin" it out though and perhaps propagate new bushes. I've read articles on proper pruning (which I haven't done). But I can't find anything about downsizing the base (roots) of overgrown shrubs. Thanks.
Downsizing an Overgrown Mock Orange Bush
Certified GKH Gardening Expert
You can rejuvenate a Mock Orange by pruning heavily, after the spring blossoms.
You can cut back 1/4 of the shrubs canes to the ground to also help rejuvenate the plant. Select the oldest canes for this pruning.
Soft wood cuttings should be taken to propagate a Mock Orange.
Dip the cuttings in rooting hormone and place in pots of sand/peat growing medium.
Keep the cuttings in partial shade and keep moist.