Lawns are very much like most things in life, they look good if you know how to treat them right and give them the time, care and attention that they need. 

A lush, thick lawn bursting with green blades of grass requires a properly-timed and balanced diet in order for it to look good, kind of like us humans. Without a healthy, balanced diet and proper care, we won't look the best and the same goes for your lawn. 

So, understanding when and how you feed your lawn with the nutrients that it needs is vital in achieving the picturesque lawn that every homeowner dreams of. Not quite sure when you need to fertilise your lawn? Don't panic, Lawn & Weed Expert are here to help! 


Starting a new lawn from seed 

Now, not every homeowner has an established lawn that they can look to repair and instead, you may need to grow your lawn from seed. If you fall into this bracket, then applying a starter fertiliser will help your lawn get the start it needs. 

Unlike already established lawns, new grass can take advantage of any extra phosphorous it is given. This is an essential plant nutrient that helps to develop strong, deep roots. So, using a lawn fertiliser that contains a healthy mix of phosphorous and other essential nutrients such as nitrogen and potassium before planting seeds is the best way to go. 

Be sure to avoid using weed and feed fertilisers within four weeks before planting your new lawn seeds. Once you've finished seeding, wait until your lawn becomes established and you've mowed it at least three times before applying.  


Fertilising an established lawn

If your property already has an established lawn that you'd like to reinvigorate with a new fertilising plan that helps it looking good year-round, here's when you'll need to fertilise. 


Early Spring 

The first time to apply fertiliser to your lawn is during the early parts of spring, usually between February and April when the temperatures begin to rise and weed and seeds start to germinate. Here you can prevent new weeds from establishing, controlling them for up to five months while feeding your lawn with the essential nutrients that it needs. 

For sure the most important thing for this step is timing. Ensure you apply your fertiliser before the crabgrass seed germinates, which is usually when your soil reaches 12 degrees celsius in temperature. To gain optimum results, apply your fertiliser with a spreader to turf that is actively growing, giving your lawn at least half an inch of water from rainfall within two weeks.


Late Spring 

The next time to fertilise your lawn is during the later part of spring, usually between April and June where existing weeds jump into active growth. Weed and feed fertilisers mentioned above combine nutrients with broadleaf weed killers to feed your growing lawn.

We recommend always double-checking the labels on your weed and feed fertilisers for your specific type of grass and following the instructions it provides carefully. For optimum results, apply your weed and feed to your lawn during the early morning when grass blades are wet with dew and no rain is forecast for a couple of days.

If planning to overseed, avoid applying your weed and weed for around four weeks prior. Once you've finished overseeding, wait until you've mowed your lawn three times.



During the summer, proper lawn feeding helps to strengthen your grass against issues such as heat and drought. Using a premium lawn fertiliser for around three months between June and August will ensure your lawn receives the essential nutrients that it needs to become the thick, green meadow you want. 

Again, always check the fertiliser label for your grass type and follow the instructions accordingly.


Late Summer to Late Autumn 

During the late summer to late autumn (between August and November) your lawn begins to slow down its growth in preparation for the winter, while broadleaf weeds simultaneously start their active growing. 

With weed and feed fertiliser, you again can feed your lawn the nutrients it needs for the winter whilst eliminating broadleaf weeds. We recommend allowing up to six to eight weeds between fertilising and the first expected frost of your lawn.


So, if you're looking for when to fertilise your lawn, following these four steps will ensure your lawn is given the best chance to transform into the glowing green meadow you've always wanted! 

If you still need additional information on when to fertilise your lawn, visit our page below to learn all about the lawn fertilising services that we offer here at Lawn & Weed Expert. 

Lawn Fertilisation Services >


If you'd like to discuss when to fertilise your lawn with one of our experts, then please do not hesitate to contact us today - we'd be more than happy to help with any questions you may have.

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