How wide does one plant Berberis julianae barberry grow. Also how far apart should they be. Thanks Stanley.
They are fully to frost hardy and will require sun or semi-shade in any soil except waterlogged soil. Watch out for the thorns.
You should propagate the species by seeds in the autumn, and the deciduous hybrids and cultivars can be propagated by softwood or semi-ripe cuttings in the summer.
Pests, diseases or disorders
Aphids and powdery mildew may be troublesome.