Scotts Lawn Builder Grub + Insect Slow Release Lawn Fertiliser

Scotts Lawn Builder Grub + Insect Slow Release Lawn Fertiliser

Size: 2.5KG

Other sizes: 4KG

Main product features

Feeds for up to 3 months
Feeds for up to 3 months
No scorch formula
No scorch formula
No surge growth
No surge growth

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

When to use



  • May be safely used on all types of lawn including buffalo, kikuyu and couch varieties as well as lawn alternatives
  • Low toxicity pest control with new technology chemical bifenthrin, which is an active insecticide that is of minimal risk to humans and domestic pets when used as per label instructions
  • 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
  • Slow-release of nutrients through controlled feeding eliminates waste through run-off and leaching and prevents burning and surge growth
  • 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
  • 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
  • The recommended application rate is a low 16 grams per m2, not the kilograms often associated with regular lawn foods!



  • 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



  • 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

Read Safety Directions before opening or using.


  • 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 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 m2
1/4 Tennis court 65
1/2 Tennis court 130
Full Tennis court 260


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)
  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


Type Spreader Setting
EvenGreen Drop Spreader 8 1/4
EasyGreen Rotary Spreader 29
HandyGreen Easy Handheld Spreader 5

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.



  • 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



IMPORTANT: This product, when wet, will cause iron stains. Be sure to sweep all granules off paths, coping, paving, driveways, 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



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

Health and Safety

Always read the pack label and product instructions carefully before use. For further information relating to product safety please review the product data safety sheet link below.

Scotts Lawn Builder™ Grub + Insect Slow Release Lawn Fertiliser main image
Scotts Lawn Builder Grub + Insect Slow Release Lawn Fertiliser 2.5KG (other sizes available)
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