Lawn & Garden Calendar for Melbourne's South-East
What to do, and when, for lawns and gardens on the clay soils common across the Dandenong Ranges and outer south-east Melbourne. Mowing height and frequency, fertilising, aeration, weeding, hedge timing, mulching, leaf season and bushfire preparation, laid out by season rather than a fixed monthly checklist.
Spring
Growth accelerates fast on the clay loam soils common through the Ranges and the corridor suburbs. Spring is the main feed-and-fix window before summer heat sets in.
Mowing
Mowing frequency should step up through spring as growth peaks, usually to weekly by October and November. Raise the cutting height slightly at the start of the season rather than scalping a lawn that's just waking up.
Lawn mowingFertilising
Spring is the main feeding window for most lawn types once the soil has warmed and frost risk has passed. A slow-release, balanced fertiliser suits most Dandenong Ranges lawns better than a fast-release product on clay, which can wash off in spring rain rather than being taken up.
Aeration
Clay soils compact more than sandy ones, and spring is the standard window to aerate before the ground dries hard over summer. Core aeration paired with a light topdress helps water and fertiliser reach the root zone rather than pooling on the surface.
Weed control
A pre-emergent herbicide applied in early to mid-spring, before soil temperatures climb, is the standard approach to reducing summer weeds such as crabgrass and summer grass. Broadleaf weeds are also actively growing now and respond well to spot treatment.
Hedges and shrubs
Evergreen hedges can be shaped once new spring growth has hardened off slightly, rather than right at the first flush. Spring-flowering shrubs should be pruned after flowering finishes, not before.
Hedge trimmingMulching
Refreshing garden bed mulch in spring, before the ground dries out, helps beds hold moisture through the first hot weeks of summer and suppresses the spring weed flush.
Mulching & chippingBushfire preparation
Spring is when defendable space work, gutter clearing and vegetation management should start, ahead of the declared Fire Danger Period rather than during it.
Bushfire readiness checkSummer
Heat and dry spells stress lawns and gardens across the corridor and the hills alike, and the declared Fire Danger Period restricts machinery use on Total Fire Ban days.
Mowing
Raising the mower deck in peak heat protects the crown of the grass and reduces moisture loss, even though it looks less manicured than a close spring cut. Mowing more often at a higher height beats mowing less often and scalping.
Lawn mowingFertilising
Heavy nitrogen feeding during hot, dry stretches can push growth the lawn can't support without consistent water. Light feeding, or holding off until conditions ease, is the more common approach for stressed lawns through summer.
Aeration
Summer is generally not the window for aeration: opening up a heat-stressed lawn's root zone in dry conditions adds stress rather than relieving it. Spring or autumn are the better windows.
Weed control
Warm-season grasses and weeds alike are actively growing, so spot-spraying and hand-weeding through summer keeps garden beds from being overtaken before autumn tidy-ups.
Vegetation and fire prep
Machinery use is restricted during the declared Fire Danger Period, and petrol equipment doesn't run at all on a Total Fire Ban day. Defendable space and gutter maintenance from spring should already be in place going into the highest-risk months.
Bushfire readiness checkOvergrown blocks
Vacant or neglected blocks are at their highest fire-risk in summer. Slashing and overgrowth clearing is usually booked earlier in the season rather than once conditions are already dry.
Overgrowth managementAutumn
The second key feeding and repair window, and the start of the heaviest leaf season in the Ranges, where deciduous exotics and shedding eucalypts overlap.
Mowing
As growth slows into cooler weather, mowing frequency steps back down and the final scheduled cuts of the season are usually lighter, tapering the lawn into its winter dormancy rather than stopping abruptly.
Lawn mowingFertilising and aeration
Autumn is the standard second feed for cool-season lawns and a strong window for aeration and overseeding before winter, while the soil is still warm enough for roots to establish before growth slows.
Weed control
A pre-emergent applied in late summer to early autumn is the usual approach to reducing winter weeds such as winter grass, before they germinate with the first autumn rain.
Leaf removal
This is the main leaf season across the Dandenong Ranges: deciduous exotics dropping their leaves in a single autumn pulse, and eucalypt leaf and bark falling more steadily through the year but adding to the autumn load. Clearing regularly through the season keeps lawns and garden beds from smothering.
Leaf removalGutters
Late April to mid-May, after the deciduous leaf drop and before the winter rain sets in, is the standard window for a full gutter clear. Hills properties often need a second clean before spring given how much falls year-round.
Gutter cleaningMulching
A mulch top-up in autumn protects plant roots through the coming cold and helps garden beds hold what moisture the winter rain provides.
Mulching & chippingWinter
Growth slows right down, but it's the main dormant-season pruning window and the period when storm damage and moss and algae growth are most common.
Mowing
Most lawns need little to no mowing through winter. Mowing a wet clay-soil lawn risks compacting the surface and rutting it, so it's worth waiting for a dry window rather than sticking to a strict schedule.
Fertilising
Dormant lawns generally don't need feeding through winter. Save the fertiliser budget for the spring and autumn windows where it actually gets taken up.
Pruning
Winter is the standard dormant pruning window for many deciduous plants, though not all: some hills natives and spring-flowering shrubs (rhododendrons, azaleas, deciduous magnolias) are better left alone until after they flower. Dead, damaged or hazardous wood can come off anything in any season.
Hedge trimmingTree work and storm timber
Winter storms bring limbs and whole trees down across the hills, and arborist callouts rise through the season. Timber left in rounds after a storm or a tree job is usually split on-site rather than moved by hand.
Tree servicesWood splitting
Timber split now is really for the winter after next: eucalypt needs at least twelve months under cover to season properly, and some hills species want closer to two years.
Wood splittingHard surfaces
Shaded driveways and paths grow moss and algae fastest in the wet, low-light conditions of winter, which is when they're most in need of a clean rather than after they've dried out again in summer.
Hard surface cleaningLand clearing
Cooler, wetter conditions and no Fire Danger Period restrictions make winter a practical window for larger vegetation and land clearing work, ahead of the next fire season.
Land clearingWant this handled on a schedule instead?
Our maintenance plans follow this same seasonal pattern: mowing, hedges, gutters and garden beds scheduled around what the season actually needs rather than booked reactively after something has gotten away.
Not sure what lawn type suits clay soil in the first place? Our guide on choosing a lawn for clay soil in the south-east covers that before this calendar picks up.
Common Questions
Does this calendar apply to sandy soil as well as clay?
It's written for the clay and clay-loam soils common across the Dandenong Ranges and the outer south-east corridor, which is most of Terra's service area. Clay holds water and compacts differently to sandy soil, which is why aeration timing and mowing-on-wet-ground advice above are specific to it. A sandy or loam property nearby can generally follow the same seasonal order, just with less caution around compaction after rain.
When's the right time of year to aerate a lawn in Melbourne's south-east?
Spring and autumn are the two standard windows. Both give the lawn time to recover and take up water and fertiliser before the stress of summer heat or winter cold. Aerating a heat-stressed lawn in the middle of summer generally does more harm than good.
When should I have my gutters cleared?
Late April to mid-May is the standard single-clean window: after the deciduous leaf drop finishes and before the winter rain sets in. Properties in the hills, where eucalypt leaf and bark fall more steadily through the year, often need a second clean before spring and ahead of fire season.
Can I use this calendar to plan a maintenance schedule instead of booking one-off jobs?
That's exactly what our maintenance plans are for: a scheduled visit cycle built around the same seasonal pattern above, so mowing, hedges, gutters and garden beds are handled on a set calendar rather than reactively.
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