Most spirea are suitable for growing in USDA zones 4-8. Take hardwood cuttings in winter with a cut just below a leaf node or bud. Place the cut end in moist potting soil and keep it moist all winter.
If you have established spirea bushes growing in your garden, you'll want to know how to prune them effectively so that they look nice and neat, and not overgrown and messy. Bear in mind ...