Barrier plants are those specimens used around the garden to restrict entrance into or through the garden.
For most people, this may infer the plants used along the fence which acts as a physical barrier to access, views and sounds.
For some people the need to create barrier plant that deters and prevents access is paramount, such as those who live on corners and have to put up with the public taking shortcuts though the yard rather than using a footpath.
Barrier plants are also great for deterring burglars from gaining access through windows.
Rather than using barbed wire, why not use nature’s deterrents... thorns, spikes and barbs.
Do not use barrier plants that may impede normal public access routes, nor likely to cause harm by innocent passer-byers.
What is needed as a deterrent hedge?
To deter pedestrian traffic, plants should be allowed to grow to at least knee height.
Also remember that if you permit the plant to grow to full dimensions, it will be difficult for you to prune and control.
Selection of Barrier Plants (shrubs and trees)
Agave americana (Century plant)
Banksia (most varieties)
Bromeliads (most varieties)
Cactus (all varieties and types)
Carissa grandiflora (Natal plum)
Duranta repens (Skyflower)
Ilex cornuta (Chinese holly)
Juniperus chinensis (Chinese juniper)
Mahonia aquifolium (Grape holly)
Pyracantha spp. (Firethorns)
Barrier Plants (climbers)
Pereskia (Barbados Gooseberry)
Barrier Plants (palms & cycads)
Calamus (lawyer cane)
Cycas revoluta (sage palm)
Phoenix roebelenii (dwarf date palm)
Note: Do not use plants that impact on public safety.