Scotts Lawn Builder™ Grub + Insect Slow Release Lawn Fertiliser

Australia's most popular lawn fertiliser has an excellent reputation with home gardeners and professional turf managers alike. The 'set and forget' solution to having a great lawn all year round, this product includes an effective insecticide to control pests that may periodically invade.

  • Suitable for all lawns
  • Controls army worm, black ant, bill bug, stem weevil and a host of other insects that may inhabit lawns from time to time
  • Slow, continuous feeding for three months
  • Will not burn when used according to the label directions
  • No surge growth = less mowing
  • Deeper roots and stronger plants
  • Thickens lawns to prevent weeds
  • Superior results compared to traditional lawn fertilisers

Suitable for all lawns

May be safely used on all types of lawn including buffalo, kikuyu and couch varieties as well as lawn alternatives

Low toxicity pest control

The active insecticide in this product is bifenthrin, a new technology chemical that is of minimal risk to humans and domestic pets when used as per label instructions

Greener stronger lawns

Boosted iron content promotes deeper green and stronger growth. The thicker the lawn, the less chance weeds have of taking hold - they're smothered before they become obvious and need treatment

Controlled feeding

Slow release of nutrients eliminates waste through run-off and leaching and prevents burning and surge growth

No surge growth after application

Traditional lawn foods release or 'dump' most of their nutrients within a couple of weeks of application, causing a rapid surge in growth that quickly drops off again as the food supply diminishes. Scotts Lawn Builder™ uses patented time-release technology to ensure nutrients are released slowly and continuously over a three month period

No phosphorus

Grub +Insect Control has no phosphorus (P), which means it can be safely used anywhere in Australia including WA, which has a 1% P limit for lawn fertilisers

Low application rate

The recommended application rate is just 16 grams per m2, not the kilograms often associated with regular lawn foods!


2.5kg bag

Suitable for

All lawn grasses including all named varieties of buffalo, traditional couch, Santa Ana couch, kikuyu, bent, fescues and carpet grass

All grass substitutes such as dichondra (also known as pennywort or kidney weed), lippia, zoysia

Not suitable for

Scotts Lawn Builder™ is not recommended for use on plants other than lawn grasses and lawn substitutes

Do NOT use on lawns within 2m of water (ponds, creeks, dams and drains)

Do NOT feed lawn clippings from areas treated with Grub & Insect Control to poultry or other animals

Do not use if the temperature is expected to exceed 30 degrees C - wait for a cool spell

How it works

  • Grub + Insect contains bifenthrin, a highly effective contact poison that controls a broad range of lawn pests
  • Scotts Lawn Builder™ is a slow release fertiliser that provides continuous nutrition over a three month period
  • Every granule of Grub + Insect contains Scotts patented time-release nitrogen
  • Nutrients are released at about the same rate that grass roots can take up the fertiliser so there is no wastage, run-off to waterways or damaging surge growth

How to use

How much will I need?
Grub + Insect has a recommended application rate of 14g/m2.
To work out how much you will need to fertilise your lawn:

  1. Calculate the area of the lawn in square metres (multiply the length by the width)
  2. The area multiplied by the application rate will give the exact amount of Scotts Lawn Builder™ you need
  3. Use a set of scales to weigh it out and then add it to the spreader ready to apply - do not be tempted to add a 'bit extra for luck' because over-application may result in nitrogen burning

    As a guide:
    ¼ of a tennis court is about 65m2
    ½ of a tennis court is about 130m2
    An entire tennis court is about 260m

How do I apply it?

  1. For best results ALWAYS use a Scotts spreader
  2. Check your model and make sure to set it correctly before you start (settings are also on the back label of the product)

    EvenGreen Drop Spreader - setting 8¼
    EasyGreen Rotary Spreader - setting 29
    HandyGreen or Easy Handheld Spreader - setting 5

  3. If you don't have a spreader, make sure you distribute the fertiliser evenly over the lawn - uneven applications may result in 'hot spot' burning where too much has landed in one spot
  4. Apply to dry grass and water in immediately

For a complete guide on how to use Scotts Lawn Builder™ Grub + Insect Control Slow Release Lawn Fertiliser, watch the video on this page and always check the packaging.

When to use

  • Apply Grub + Insect when insect pests are first noticed in the lawn OR apply as part of your regular lawn maintenance program
  • Follow-up treatment may be required when pests are present in high numbers but wait for at least three weeks after the first application to observe how well it has worked before considering a further application
  • Avoid feeding lawns in cooler regions in Winter.
    • The release of nutrients from granules is controlled by temperature.
    • In Winter when soil temperatures are low and lawn growth is extremely slow in many areas, the granules will simply 'sit' there.

Safety Information

IMPORTANT: This product, when wet, will cause iron stains. Be sure to sweep all granules off paths, coping, paving, diveways, shoes, etc immediately after use. Do not allow the granules to come into contact with these surfaces when they are wet.

Store safely out of the reach of children and pets. This product contains iron which can be harmful to dogs' livers if eaten in quantity.

  • Safety first:
    Read the instructions on the product packaging before use and take particular note of any warnings or cautions on the label
    We recommend wearing gardening gloves when handling this product

    See the Safety Data Sheet for this product

Technical details

  • NPK 30 : 0 : 3
  • Contains bifenthrin, a low toxicity new technology insecticide that is effective against a broad range of lawn pests
  • Feeds for 3 months without burning when used as directed and applied at no higher than the rate recommended on the bag
  • Includes Scotts patented time-release nitrogen and potassium formulated to release nutrients as your lawn needs them

Where to buy it

Decided what product best suits your needs? Or would you prefer to go in-store to ask for more information?

Visit your local Bunnings Warehouse for our largest range.

You can also find Scotts products in a number of gardening, hardware, independent and supermarket retailers including Flower Power, Mitre10, Coles and Woolworths.

Note: Not all brands and products are stocked in all stores. For any additional questions please visit our contact us page.

In New Zealand, go to your local Bunnings warehouse

Tips, tricks & advice

Seasonal Lawn Care Tips

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