How to Propagate Cooper's barberry?
Propagate by seed sown in a seedbed in early spring. Many Berberis species cross freely in gardens, so seed-raised plants are often hybrids. Take semi-ripe cuttings in summer.

Cooper's barberry · Berberis cooperi
Grows in any soil except waterlogged. A sunny position will encourage fruiting. For more information please see shrub cultivation.
Propagate by seed sown in a seedbed in early spring. Many Berberis species cross freely in gardens, so seed-raised plants are often hybrids. Take semi-ripe cuttings in summer.