South Australian winters are hard on trees. Heavy rain softens the soil. Strong winds push through the suburbs. One rough storm can snap branches or bring an unstable tree crashing down onto a house, fence or driveway.
This article explains the warning signs to look for before winter hits, how proper pruning reduces storm risk and what to do if a tree becomes dangerous after severe weather.
Most storm damage starts long before the bad weather arrives. The warning signs are usually there first.
A dead branch hanging high in the canopy. Cracks in the soil around the base. A tree that suddenly starts leaning after heavy rain. These problems often develop slowly, then fail all at once when winter storms arrive.
You can’t control the weather, however, you can control how prepared your garden is before the next strong front moves through your yard.
Walk around your property and inspect every large tree carefully, especially trees near homes, sheds, powerlines, pools and neighbouring fences.
Fresh cracks in the ground can mean the root system is starting to move. Wet soil loses strength during winter, and strong wind can slowly lift the roots up out of the ground. A shifting root plate is a serious warning sign.
Mushrooms or bracket fungi growing from the trunk or base often indicate internal decay. The tree may still look healthy from the outside while the wood inside is slowly breaking down. Decayed trees are far more likely to fail during storms.
Deadwood becomes brittle. It does not flex properly in strong wind. It snaps. Large dead branches can fall without warning and cause major damage when they drop from height.
Branches with tight V-shaped joins often have poor attachments. As the canopy becomes heavier, these weak unions can split apart during high wind.
Some trees naturally grow at an angle. A new lean is different. If a tree has recently started leaning after rain or wind, the roots may already be compromised.
A dense canopy acts like a sail. Wind pushes against the leaves and transfers that force into the trunk and roots. Good pruning reduces that pressure.
Professional pruning removes deadwood, reduces heavy limbs and improves airflow through the canopy. The goal is not to strip the tree back. The goal is to improve structure while keeping the tree healthy and balanced. Done properly, pruning reduces storm risk. Done badly, it creates more problems.
Tree lopping is not professional pruning. Lopping removes large sections of the canopy without considering tree structure or future growth. The tree responds by producing weak regrowth around the cuts. These fast-growing shoots can be poorly attached and far more likely to snap later. Lopping also increases stress, decay and long-term instability.
Storm preparation is not only about the trees themselves. Overgrown vegetation hides problems. Thick scrub can conceal root movement, drainage issues and decaying trunks. Dense undergrowth also traps moisture around the base of trees, which increases the risk of root problems and fungal decay. Clearing overgrown sections before winter improves drainage, visibility and access around large trees.
For larger properties and neglected blocks, professional land clearing can reduce both storm hazards and future maintenance problems.
A dead tree cannot recover from stress. The wood becomes dry and brittle. Branches break easily. The trunk can split without warning. Dead trees near homes, driveways or public areas should be removed before storm season arrives. Waiting usually makes the job more dangerous and more expensive.
Even healthy trees can lose branches during severe weather. After a storm, inspect your property carefully from the ground. Look for cracked branches, lifting soil, broken limbs or damage to fences and roofs. Then look up!
Broken branches often become trapped high in the canopy. These hanging limbs are extremely dangerous because they can fall days later without warning.
Do not try to pull them down yourself. Storm damaged timber is often under heavy tension and can move violently when cut incorrectly.
If a tree has fallen, shifted or dropped a major limb, bring in a qualified arborist with the right equipment to handle the work safely.
Before winter storms arrive:
Winter weather exposes weak trees. It finds the dead branch, the overloaded canopy and the root system that no longer has enough strength to hold.
The safest time to deal with those problems is before the storms arrive.
Adelaide Arborists can inspect dangerous trees, prune unstable canopies, clear overgrown sites and respond to storm damage safely.
If your trees are already showing warning signs, now is the time to act before winter conditions make the situation worse.
