The Best Time to Prune Hedges and Shrubs in the Lake Macquarie
If there's one garden task that's worth doing at exactly the right time of year, it's pruning. Do it too early and you stimulate soft growth that gets hit by late cold snaps. Do it too late and you cut off the buds that were about to produce your spring flowers. Get the timing right and your hedges and shrubs reward you with strong, healthy regrowth and a great shape through spring and summer.
For most hedges and shrubs across the Central Coast and Lake Macquarie region, that right time is right now — mid to late winter, before the spring growth flush begins.
Here's what you need to know.
Why Winter Is the Best Time to Prune
When a plant is dormant or semi-dormant in winter, pruning causes significantly less stress than it would at other times of year. The plant isn't actively growing, so it isn't losing resources it needs for immediate function. Instead, it can put its energy into healing the pruning cuts and preparing for the burst of new growth that comes with warmer temperatures.
There are two other practical advantages to winter pruning. First, without foliage in the way on deciduous plants, you can see the structure of the plant clearly and make better decisions about what to remove. Second, any mistakes you make are quickly covered by the spring regrowth — a forgiving characteristic that makes winter a great time for less experienced pruners to have a go.
What to Prune Now
Lilly Pilly One of the most common hedging plants across Cooranbong and Lake Macquarie, Lilly Pilly responds very well to a hard prune in late winter. If your hedge has gotten out of hand or lost its shape, now is the time to cut it back hard. It will flush with new growth in spring and fill back in quickly. For maintenance trimming, Lilly Pilly can be done at any time of year, but the major work is best done now.
Photinia (Red Robin) Photinia is another local favourite, prized for its bright red new growth. Pruning in winter encourages a flush of that colourful new foliage in spring. Cut back to just above a healthy bud, and don't be afraid to take it back significantly if the plant has become leggy or overgrown.
Viburnum Viburnum hedges and screening plants can be pruned hard in winter. They're tough, respond well to cutting back, and will fill in quickly once the weather warms. Shape them to your preferred height and width now, and they'll hold that shape through most of the spring and summer with only light maintenance trims needed.
Roses Late winter — typically late July to early August in our region — is the traditional time to prune roses. Cut back by roughly one third to one half, remove any dead or crossing canes, and open up the centre of the plant to allow good airflow. A good prune now leads to a spectacular spring flowering display.
Deciduous ornamental trees and shrubs Any deciduous plant — one that drops its leaves in winter — can be pruned while dormant. This includes ornamental pears, Japanese maples, crepe myrtles, and wisteria. With the foliage gone you can see exactly what you're working with, making it much easier to create a good structure.
Ornamental grasses Most ornamental grasses benefit from being cut back hard in late winter — down to around 10–15cm from the ground. It looks drastic, but they bounce back with vigorous, attractive new growth in spring. If you've never done it before, it's one of the most satisfying garden tasks you can do.
What NOT to Prune Now
Timing matters just as much for what you hold off on as what you cut.
Spring-flowering plants — including azaleas, camellias, and gardenias — set their flower buds in autumn and carry them through winter ready to open in spring. If you prune these now, you'll remove all of those buds and lose the spring display entirely. Wait until they've finished flowering before you do any significant pruning.
Native plants in flower — many Australian natives flower through winter and early spring. Pruning them now removes the flowers and the habitat value they provide for local birds and insects. Wait until flowering is complete.
Frost-sensitive plants — if a plant has suffered frost damage over winter, resist the urge to prune the damaged material until the risk of frost has passed. The dead material actually provides some insulation for the healthier growth underneath. Prune it out in September once conditions have warmed.
How Hard Can You Cut?
This is the question most people are nervous about, and understandably so. The answer depends on the plant, but as a general rule, most established hedging plants across our region are tougher than they look.
Lilly Pilly, Photinia, Viburnum, and most other common hedging plants can be cut back by a third to a half without any real risk. If a hedge has become very large and overgrown, you can often be even more aggressive — though it's generally better to do a significant renovation over two seasons rather than all at once.
If you're unsure, a good rule of thumb is: cut back to where you can see healthy, green wood. Don't cut into dead or grey wood at the base of very old stems, as these may not regenerate.
The Tools Matter
Clean, sharp tools make a genuine difference to pruning results. A blunt pair of secateurs crushes and tears plant tissue rather than cutting cleanly, which slows healing and can introduce disease. Before you start, sharpen your secateurs and loppers, and wipe the blades with a cloth dampened with methylated spirits between plants to avoid spreading any disease from plant to plant.
For hedges, electric or battery-powered hedge trimmers make the work much faster and produce a cleaner, more consistent finish than hand shears for most people.
After Pruning
Once you've finished pruning, clean up all the clippings from around the base of the plants. Left in place, they can harbour fungal disease and pests. Follow up with a light application of slow-release fertiliser to give the plant the nutrients it needs to support the burst of new spring growth, and top up mulch around the base to retain moisture.
Let Us Handle It
Pruning is one of those tasks that makes a big difference when done well — and can cause real problems when done at the wrong time or in the wrong way. If you'd rather leave it to someone who knows exactly what to cut, when, and how much, ALTA Garden Care provides professional hedge trimming and garden pruning services across Cooranbong, Morisset, Dora Creek, Bonnells Bay, Halekulani, Magenta, Mardi and surrounding areas.
Get in touch through our website for a free quote.