A good windbreak transforms a property. Wind speeds drop by 50-70% on the leeward side, soil moisture stays higher, livestock and gardens stop getting hammered, and dust drops dramatically.
The trick is filtering wind, not blocking it. Solid walls create turbulence on the other side. Living windbreaks let wind through slightly, reducing speed without creating chaos.
Layer the heights
The best windbreaks are multi-tiered. A tall tree like Casuarina or Eucalyptus mannifera catches high wind. A mid-storey like Banksia integrifolia or Acacia pendula filters middle wind. A lower shrub layer protects ground level.
Single rows of one species rarely give the best result. Plant in staggered double or triple rows for proper filtering.
Plant on the windward side
A windbreak protects ground up to 10-20 times the tree height downwind. Plant your windbreak on the side the prevailing winds come from. In southern Australia that often means the western and southern boundaries.
Match tree to site
Coastal sites need salt tolerance: Banksia integrifolia or Casuarina. Inland dry sites need drought hardiness: Acacia pendula or Eucalyptus mannifera. Suburban sites need narrow form: Pittosporum Silver Sheen.
Care basics
Water deeply through the first two summers. Mulch heavily. Stake young trees firmly. Once established, most windbreak species need almost no attention.
Frequently asked questions
How wide does a windbreak need to be?
Three to five metres for serious wind filtering. Tighter than that and you get less filtering and more turbulence.
Will a windbreak work in suburban gardens?
Yes. A narrow Pittosporum Silver Sheen screen takes wind speeds down across a small property.
How tall before it works?
Effective wind filtering starts at 3-4m. Real protection kicks in once the windbreak reaches 5m or above.
Comments