Go to your local ag centre (Elders etc) and get a bag of coarse salt and sprinkle a 'border' around your plants. The salt will kill them but don't sprinkle the salt in a general area or too close to your plants as the salt will kill the plants as well.




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maz. The sawdust is good for the compost as well if it's not been chemically treated. Possibly even find a sawmill around your way and ask if you can get some, they would probably give it to you for nothing.

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