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Frequently Asked Questions

General Questions Weed Killers

Fungicides

Lawn Grub 

 

QUESTION ANSWER
General Questions  
How important is it to follow directions on the label? When using garden chemicals, always read the label first, making sure that you follow the directions with regard to dilution and application rate. The rates shown have been designed to be of optimum effectiveness and efficiency. Some chemicals such as herbicides and lawn products describe an amount to be used over a certain area, and it is important to keep to these coverage rates.
How safe are Amgrow garden products?

All our products detail directions for their safe use, storage and disposal. When used according to these directions, our products are safe for the home gardener.

Where can I buy Amgrow Products?

Our products are sold in Independent local nurseries, Flower Powers, Big W, Kmart, Mitre 10 stores, Plants Plus Nurseries, Greengold Nurseries, Plants Australia Nurseries, Bunnings, Home Hardware, selected Grocery Stores

How much concentrated Wettasoil, Nitrosol or Charlie Carp do I use if I want to re-use my 2L Hose-On container? Use 250mL of concentrated Wettasoil with Seaweed and top up to 2L with water. Click on the hose and use as normal
We have water restrictions in our area and cannot use the hose. How much of the Wettasoil, Nitrosol or Charlie Carp from the Hose-On container do I put in a watering can? In an average 9L watering can, use 300mls of the Hose-On Wettasoil, top up with water and spread over 10 square metres.
Herbicides (Weed Killers)  
What is the difference between “selective” and “total” herbicides?

A selective herbicide is one that can be used on a lawn to kill weeds without killing the grass, e.g. Bin-Die, Kleen Lawn, Winter Grass Killer. Care needs to be taken to avoid spray drift onto nearby garden beds as other wanted plants can be damaged.
A total herbicide is one that will kill all plants including grasses, e.g. Glypho, Eraze, Tree & Blackberry Killer. These products cannot be used on a lawn or on any wanted plants as they will damage all green plants.

What precautions should I take when using weed killers for the safety of children? Ensure that children are out of the area while spraying and only allowed back into the garden when the weed killer has dried.
When can I let my dog or cat back into the garden after using a weed killer? Keep your pets out of the way while spraying. Once the weed killer has dried on the grass or sprayed area, it is then safe to let the pet back onto the area.
What about safety for rabbits, guinea pigs, chooks and other grazing animals? It is recommended that grazing animals and chooks be kept off lawns for two weeks after treatment with herbicides. The exceptions to this rule are Glypho and Eraze, which are safe for grazing animals as soon as they have dried.
Why do the directions for some of the weed killers give a range of water to use, and not an exact amount? All the selective lawn herbicides also detail an area to be covered. This is more important than the amount of water used to achieve this coverage. If you have a sprayer that delivers a very fine spray then you can achieve the coverage required with less volume of water than ifyou use a coarse sprayer.  When a watering can is used, more water is required because a watering can will not give the same coverage as a spray.

How much time after spraying should elapse, before rain or watering?

A better result is achieved if at least a full day passes without rain or watering.
How soon before or after spraying can I mow my lawn? Do not mow for at least three days before spraying so that the maximum leaf area is available for the weed killer to work on. Also when the grass is mown it exposes a cut area which can result in burning if herbicide is used straight away. After spraying, leave for at least three days, more if possible, to allow the herbicide to be carried around the weed.
Fungicides:  
There doesn’t seem to be any directions for use on the Copper Oxychloride or Mancozeb products, so how much should I use? The labels for both these products open out to show all directions required on the underside of the flap. Some of the earlier print run of these labels say “Peel Here” slightly to the left of the front of the jar. The later versions have a large panel which says “Open Here for Directions”
How much does the 5mL spoon hold when using the powdered products?

Copper Oxychloride            3.5 grams (Level spoons)
Mancozeb                           3 grams
   (Level spoons)
Sulfur Spray                        3 grams
   (Level spoons)

Can I use Fongarid on my fruit and vegetables? No, Fongarid is not registered for edible crops as it is a poison and is taken up by the plant (systemic).
Lawn Grub Products  
Why do the directions for the Lawn Grub Killer 500 and Grubkil 500 say “12mL per 100 square metres”, and then say to apply that in 10-20L of water, not an exact amount? The actual coverage of the 12mL per 100 square metres is more important than the amount of water used to achieve this coverage. If you have a sprayer that delivers a very fine spray then you can achieve the coverage required with less volume of water than if you use a coarse sprayer.  When a watering can is used, more water is required because a watering can will not give the same coverage as a spray.
Why is it that Lawn Grub & Beetle Killer Granules are watered in but the liquid lawn grub killers are not?

The granular product requires water to activate the chemical and push it down into the soil to get to the root zone of the grass. The liquid products are designed to kill Lawn Army Worm that eats the actual leaf of the grass, and Lawn Grub or beetle that eats the roots. If the problem is Army worm, allow the spray to dry on the leaf, but if the Lawn Grub or Beetle is the problem, then a gentle watering would improve its performance.

   
   
 

 

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