Melbourne summer demands more from garden maintenance than any other season — and more from the gardener. Fast growth in November and December means hedges and lawns need regular attention. The heat of January and February stresses plants in ways that correct maintenance can prevent and incorrect maintenance makes worse. And the combination of heat and irregular watering creates conditions for fungal disease and rapid weed germination. This guide covers the practical summer maintenance schedule for Melbourne gardens. For preparation before summer arrives, see our spring garden maintenance guide.
Lawn care through Melbourne summer
Mowing frequency and height in December and January
November and December are typically the fastest-growth months for Melbourne warm-season lawns. Fortnightly mowing is the minimum in this period — weekly is better for keeping the lawn manageable. The one-third rule applies: never remove more than one-third of the blade height in one pass. For the target heights by grass type and common mowing mistakes, see our lawn mowing mistakes guide.
Watering strategy: deep and within restrictions
Melbourne's permanent water restrictions (before 10 am or after 4 pm for sprinklers and irrigation) apply through summer. Deep, infrequent watering — soaking the soil to 15 to 20 cm — is significantly more effective than daily shallow watering. For the full guide to Melbourne summer lawn watering, see protecting your lawn in Melbourne summer.
Hedge maintenance: regular trims through the growing season
Fast-growing species like lilly pilly and murraya need trimming every 6 to 8 weeks through November, December, and January. A November trim, a late December or early January trim, and a February trim keeps formal hedges well-shaped and avoids the cost and effort of dealing with overgrown material. Avoid major renovation cuts in peak summer heat — save those for spring.
Summer maintenance sorted, without having to think about it.
Fortnightly mowing, hedge trims on schedule, and all the clippings removed. Book a summer program.
December: the critical preparation month
- First summer hedge trim before the holiday period (avoids overgrowth over Christmas)
- Check irrigation and sprinkler systems — fix issues before peak heat
- Apply mulch to any beds that were not mulched in spring
- Light fertiliser application if not done in October-November
January: the heat management month
- Water deeply before forecast heatwave days (the day before, not the day of)
- Raise mowing height to maximum for your grass type during extreme heat
- Avoid mowing on days over 35 degrees
- Monitor for lawn grub damage (check for loose turf that lifts away from the soil)
- Do not fertilise during peak heat stress — wait until February
February: transitioning out of peak heat
February in Melbourne is still hot but the worst of the summer heat typically begins to ease by mid-to-late February. This is a good window for a final summer hedge trim before the autumn growth flush, and for resuming any fertiliser program that was paused during peak heat. It is also when to assess any lawn damage from January heat and start planning any necessary repairs that will be done in the autumn window.
Green waste management through summer
Regular mowing and trimming through summer generates significant green waste. Options include mulch mowing (returning fine clippings to the lawn in dry conditions), the council green waste bin, and a professional removal service for larger volumes. See our guides on catching vs mulching clippings and green waste removal in Melbourne for how to handle this efficiently.
FAQ: Summer garden maintenance in Melbourne
How often should I mow in Melbourne summer?
Fortnightly at minimum during November and December when growth is fastest. In January and February, the growth rate typically slows slightly in heat and dry conditions, and every 2 to 3 weeks can be adequate depending on conditions and rainfall.
What should I do when a Melbourne heatwave is forecast?
Water deeply the day before (within restriction times). Move potted plants to shade or protected positions. Raise the mowing height if mowing before the heatwave. Do not mow or trim during the heatwave. After the heatwave passes, assess for damage before resuming normal maintenance.
Is January a good time to start a new garden project in Melbourne?
No. January is the worst time to plant new plants, lay new turf, or start major garden projects. Establishment requires consistent moisture, and newly planted material in Melbourne's January heat is a significant ongoing watering commitment. Late February or March is a much better window for any new planting.
How do I keep my hedges looking good through Melbourne summer?
Regular light trims every 6 to 8 weeks for fast-growing species. Water the hedge well in the day or two before trimming — water-stressed hedges do not recover as quickly from trimming. After trimming, apply a light watering to help the hedge recover from the stress of cutting. See the full hedge trimming frequency guide for species-specific schedules.
