A good layer of mulch is about the closest thing gardening has to a magic trick. Spread it over your beds and it keeps the soil cool, holds in moisture, and saves you dragging the hose out every single arvo. Here is how to use garden mulch to keep your Coffs Coast patch thriving right through summer.
Summer on the Coffs Coast is a mixed bag. Hot, sticky days, warm nights, and the odd fortnight where the sky forgets how to rain. Our gardens cop it, and bare soil dries out faster than you would think. The good news is that a bag or two of mulch, plus a few smart watering habits, does most of the hard yakka for you. Sort it before the silly season hits and your garden will still be green when you wander back from the beach.
Quick summary
- Mulch keeps soil moist, cool and weed-free, and can cut how often you water by up to around 60 per cent.
- For veggie beds, reach for light bagged organic mulches like sugar cane, lucerne or pea straw.
- Lay mulch around 5 to 7 centimetres thick, and keep it clear of stems and trunks.
- Water deeply in the early morning rather than a light splash every evening.
- Give new and potted plants some shade in a heatwave, and set the garden up before you head away for the holidays.
Why Is Garden Mulch Your Best Mate in Summer?
Mulch is simply a protective layer spread over the soil, and in summer it really earns its keep. It slows evaporation so water stays down in the root zone where plants can use it, instead of steaming off the surface on a 32 degree day (Sustainable Gardening Australia). Charles Sturt University points to research showing a good layer of mulch can cut how often you need to water by around 60 per cent (Charles Sturt University). That means less time on the hose, a smaller water bill, and happier plants.
Locking Moisture Into the Soil
Bare soil bakes hard and cracks in the heat, and every time you water, a good chunk vanishes straight back into the air. A layer of mulch works like a hat for your garden, shading the surface and keeping that moisture down where the roots can reach it.
Cooler Roots and Fewer Weeds
Mulch also steadies the soil temperature, so roots are not cooking one day and cooling the next. As a bonus, it blocks the light that weed seeds need to sprout, which means less weeding for you and less competition for water and food.
What Is the Best Mulch for a Coffs Coast Garden?
The best mulch depends on the job. For veggie beds and flower gardens, light organic mulches are hard to beat. For paths and low-fuss corners, a longer-lasting mulch makes more sense. We stock a range of bagged mulches and composts, which makes it easy to grab what you need and store the rest in the shed. Here is a quick guide.
| Mulch type | Best for | Good to know |
|---|---|---|
| Sugar cane | Veggie beds and flower gardens | Light and easy to spread, breaks down to feed the soil |
| Lucerne | Veggie beds and hungry plants | High in nitrogen, gives poor soil a real boost |
| Pea straw | Veggie beds and seedlings | Feeds the soil quickly, needs topping up more often |
| Bark or wood chip | Paths, natives and low-fuss beds | Longer lasting, breaks down slowly |
| Synthetic mulch | Paths and low-maintenance areas | Very long lasting, but does not feed the soil |
Organic Mulch for Veggie Beds and Gardens
Light organic mulches such as sugar cane, lucerne and pea straw are great for the veggie patch, because they hold moisture and feed the soil with nutrients as they break down (ABC Gardening Australia). Keep them clear of low-growing fruit like strawberries though, since they can give slugs and snails a cosy place to hide.
Longer-Lasting Mulch for Paths and Natives
For garden paths, native beds and spots you would rather not top up often, a coarser bark or wood chip lasts longer and breaks down slowly. Synthetic mulches last longer again, though they will not improve your soil the way organic ones do.
How Much Mulch Do You Need, and How Do You Lay It?
As a rule of thumb, spread organic mulch around 5 to 7 centimetres thick. That is enough to block weeds and hold moisture without smothering your plants. Any thinner and weeds push straight through; much thicker and it can mat down and actually stop rain reaching the soil.
Think Doughnut, Not Volcano
Keep mulch a few centimetres clear of stems and trunks. Piling it up against the base of a plant, like a little volcano, traps moisture against the stem and invites rot. A doughnut shape with a clear gap in the middle is what you are after.
Water First, Then Mulch
Give the soil a good soak before you lay mulch down, since dry mulch on dry soil can shed water rather than let it soak in. Remember, mulch holds moisture in, it does not create it.
How Should You Water Through a Coffs Coast Summer?
Water deeply and early. A long soak a couple of times a week does far more good than a quick splash every evening, because it draws roots down deep where the soil stays cooler and damper for longer.
Early and Deep Beats Little and Often
Watering in the early morning gives plants a drink before the heat kicks in, and lets the leaves dry off, which helps keep fungal problems at bay in our humid summers. Light daily sprinkles only wet the surface and train roots to stay shallow and thirsty. A bit of decent watering gear makes the job quicker too.
Make the Most of Every Drop
A rainwater tank is a handy way to keep the garden going through a dry stretch without watching the water bill climb. Pair one with a good layer of mulch and you are squeezing the most out of every drop.
How Do You Protect New Plantings From the Heat?
Young plants and fresh seedlings have shallow roots and wilt fast in a heatwave, so they need a bit of extra help. A length of shade cloth over the bed, or a temporary cover during the hottest part of the day, can be the difference between a plant that sails through and one that frazzles.
Shade and Shelter for the Little Ones
Seedlings and newly planted stock appreciate some afternoon shade while they settle in. Even an old umbrella or a bit of hessian pegged up over the bed will do the trick for a few days.
Look After Your Pots
Potted plants dry out much faster than garden beds, so shift them into the shade during a hot spell and group them together so they shade each other. Sitting pots on saucers helps them hold onto a little extra water too.
Heading Away for the Holidays?
Summer and holidays go hand in hand on the Coffs Coast, so set the garden up to look after itself before you go. A deep soak, a fresh top-up of mulch and a bit of shade will keep things ticking over while you are away.
A Quick Pre-Holiday Checklist
- Give every bed a deep water the morning you leave.
- Top up mulch to a full 5 to 7 centimetres to hold that moisture in.
- Move potted plants into the shade and group them together.
- Ask a neighbour to pick the ripe veggies while you are gone, and send them home with a share of the harvest.
How Coffs Harbour Produce Can Help Your Garden Beat the Heat
We have been helping Coffs Coast gardeners since 1985, so we know exactly what our summers throw at a garden. Pop into our Coffs Harbour store or our sister store Valley Rural Supplies in Nambucca Heads to pick up bagged mulch, compost and fertiliser, and to get a straight answer on what suits your patch. Not sure what you are working with? Bring in a handful of soil and our team can help you work out your soil type on the spot. Can’t make it in? Order by 3pm for free next-day delivery across the greater Coffs Harbour region (conditions apply), or use our drive-through and we will load the car while you stay put.
Frequently Asked Questions
What is the best mulch for a vegetable garden?
Light organic mulches like sugar cane, lucerne and pea straw are the pick for veggie beds. They hold moisture well and feed the soil as they break down. Just keep them away from low-growing fruit like strawberries, where they can harbour slugs and snails.
How thick should I lay mulch?
Aim for around 5 to 7 centimetres. That is thick enough to block weeds and hold moisture, but not so thick that it mats down and stops water getting through. Keep it clear of plant stems and trunks.
Does mulch really save water?
Yes. By shading the soil and slowing evaporation, a good layer of mulch can cut how often you need to water by up to around 60 per cent, which adds up to a real saving over a long, hot summer.
How often should I top up mulch?
Organic mulch breaks down over time, so check it every few months and top it up as it thins out, usually once or twice a year. You want to keep that 5 to 7 centimetre layer doing its job.
Can you use too much mulch?
You can. Piling mulch thick against stems, or letting it mat down into a solid crust, can starve roots of air and stop rain soaking through. A moderate, even layer with a gap around each plant is all you need.
Ready to Mulch Up for Summer?
A few bags of mulch, a deep water and a bit of shade is all it takes to keep your garden happy through a Coffs Coast summer. If you would like a hand choosing the right mulch, or you just want to talk through your patch first, the team at Coffs Harbour Produce is at 26 June Street, Coffs Harbour, on 02 6652 2599, or you can send an online enquiry. Call, email, or drop in and say g’day.
References
- Sustainable Gardening Australia, Conserving & saving water, https://www.sgaonline.org.au/conserving-water/
- Charles Sturt University, Mulching 101, https://www.csu.edu.au/social-impact/environment/mulching-101
- ABC Gardening Australia, How to choose the right mulch for your garden, https://www.abc.net.au/news/2023-01-21/how-to-choose-mulch-for-your-garden/101872734
