How to control weeds organically

Weeds are one group of plants that no gardener likes, with many of them aggressively taking over the minute we turn our backs. Luckily there are plenty of organic ways to keep weeds at bay without the need for nasty chemicals. Here are some top tips from Eco Organic Garden.

Prevention is the best cure

Weeds love bare soil so keep yours covered to prevent many weeds from colonising your garden. By densely planting your garden beds there’ll be little room for pesky weeds to appear. Low-growing ground covers are particularly handy to fill any gaps between larger shrubs. Also, remember to mulch around plants to help further prevent weeds growing, but be clever and use materials such as sugarcane and pea straw that’ll break down and improve the soil.

Weeds are known to thrive not only in poor soil, but also in soil with an extreme pH range. So, test your soil and if it’s too acidic, apply eco-flo lime or eco-flo dolomite to correct it. If it’s too alkaline, add sulphur. In addition, you can improve soil quality with manure, compost and regular doses of Eco Organic Garden’s eco-seaweed. Then your plants will thrive and the weeds won’t stand a chance.

Pull weeds when they’re small and before they seed

Monitor your garden regularly and remove weed seedlings as soon as they appear. They’re not only easier to remove when young but it stops them setting seed and spreading further. Hand weed smaller areas or grab a hoe and rip through larger areas in no time. Weed after rain when the soil is moist to make the job easier. For most weeds, you need to remove both stems and roots otherwise they can re-sprout. This is especially true for stubborn weeds like oxalis and nutgrass.

Solarisation and sheet mulching

Treat large weed-infested areas with solarisation. This is where lengths of black plastic are laid over the weeds and left covered for a few weeks. The combination of blocked sunlight and built-up heat results in a good kill. Mow or whipper snip tall weeds to make the job easier and pin down the plastic with bricks, rocks or clumps of dirt so it stays firm.

Another method is to lay down a thick layer of wet newspaper on weed-infested areas. Ensure there are no gaps and then mulch over the top. The covered weeds will die and as the newspaper breaks down, it’ll improve soil.

Use organic weed spray

If you need to spray, then use Eco Organic Garden’s slasher weedkiller, which is a fast and effective registered organic herbicide. It’s made from plant oils that burn and desiccate weeds but without harming the soil. Slasher weedkiller is also safe for people and pets. Just remember to spray the weeds thoroughly for the best results. Woody weeds and those with underground bulbs and stems may reshoot and need a follow up spray. Slasher weedkiller is also great for controlling moss, algae and lichen.

Get your garden under control

View the full Eco Organic Garden range available at your local Bunnings.
How to control and eliminate garden pests organically

Planting & Growing How to control and eliminate garden pests organically Try controlling garden pests with these approaches from Eco Organic Garden.

How to control weed organically

Planting & Growing How to control weeds organically There are plenty of organic ways to keep weeds at bay without the need for nasty chemicals. Here are some top tips from Eco Organic Garden.

How to improve soil organically

Planting & Growing How to improve soil organically The key to a thriving garden is to have rich, healthy soil that in turn supports strong plant growth, improved flowering and bigger harvests in the vegie patch. Here’s some advice on how to fix the most common soil problems from Eco Organic Garden.

How to treat and control plant disease organically

Planting & Growing How to treat and control plant disease organically Eco Organic Garden shares some tips on how you can help improve the health of your plants.

Six plants that repel mosquitoes and flies

Planting & Growing 6 plants that repel mosquitoes and flies Using plants is a natural and effective way to repel mosquitoes, flies and other insects from entering your home. Here’s a list of the six best insect-repelling plants.

Person planting spinach 03:11

Planting & Growing How to grow vegetables Watch our step-by-step guide and find out everything you need to know about how to grow fresh vegetables in your garden.


Planting & Growing How to create a low-allergy garden If you suffer from hay fever or other allergies, then being out in the garden can, at times, be less than enjoyable. But there are some steps you can take to create an allergy-friendly garden so you can spend more time gardening and less time sneezi...

Grevillea plant

Planting & Growing 11 ground covers for your garden Whether you’re looking to cover a large area or simply fill some space between plants in a garden bed, there are many types of garden ground covers to consider. Some have a scent, some feature flowers and all vary in leaf colour, density and coverag...

Lawn care products 02:35

Lawn How to fertilise your lawn Learn some great tips for fertilising your lawn and keeping it green and healthy all year round.

Brighten up your place with an instant hedge 00:22

Planning & Projects Brighten up your place with an instant hedge An artificial hedge or plant wall is not only an attractive feature in your garden, it can also add some much needed privacy. Bunnings Greenlife buyer Katie tells us how easy it is to add an instant hedge to your outdoor area.

Chilli Plant

Planting & Growing Growing chilli plant care guide Add a little fire to your food garden with a chilli plant. It’s not just a food plant, it can become a collectable obsession, too!

brick planter box 05:14

Planters D.I.Y. brick planter box A brick planter box is a great way to brighten up your outdoors. Learn how easy it is to build one in your garden.

Person mixing brown and green waste 01:40

Composting How to make your own compost Find out how to fertilise plants naturally by making your own compost. It’s a great way to save money and get rid of some household waste.

Woman measuring up the garden 01:45

Watering & Irrigation How to plan a garden irrigation system Before you irrigate your garden it’s best to be prepared. We’ll take you through the steps to plan out a garden irrigation system.


Garden Tools How to choose digging tools The right tool will make any job easier, especially when it comes to digging. And when it comes to digging, there's no shortage of tools to choose from – but which tool is right for which job?

front garden makeover 01:24

Planning & Projects How to give your front yard a makeover Learn how to transform your front yard into a tropical oasis.

Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
Top of the content