Thorny shrubs are difficult to work with. Use them for their value as barriers, planting them where they will not scratch passers-by or interfere with garden activities. The following shrubs provides an impenetrable barrier.

Berberis species - Barberry
Chaenomeles speciosa - Flowering Quince
Elaeagnus pungens - Silverberry
Hakea suaveotens - Pincushion Tree
Ilex cornuta - Chinese Holly
Mahonia species - Oregon Grape Holly
Osmanthus heterophyllus - Holly Olive
Poncirus trifoliatus - Hardy Orange
Pyracantha coccinea - Scarlet Firethorn
Ribes speciosum - Fuchsia-Flowered Gooseberry
Rosa species - Rose