Lawn Aeration Procedure

 
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*The above Lawn Aeration Equipment products are available in the Lawnsmith Shop and discussed below:

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For lawn aeration using a hand held hollow tine aerator* the more holes the merrier so keep it dense with spacing every couple of inches. If you’re spiking using a petrol lawn aerator with solid tines, rolling lawn aerator* or aerator sandals*  just keep going up and down until you've had enough. You really can't overdo it!

For slitting, chisel tining or hollow tine aeration with a machine, one run in one direction is sufficient. Anymore and you may cause some surface disruption. When using a powered lawn aerator to remove cores you may want to avoid running over the cores with the wheels as they will be a swine to remove later on. Which brings me to the next point;

What to do with the cores after hollow tine aeration?

The best thing to do is to let them dry in place and then go over them with the lawn mower with the box off if the instructions allow. A rotary is ideal to re-distribute the soil from the cores back over the lawn. This also works using a scarifier. This has a double benefit:

  • Recycles all the valuable nutrients
  • Stimulates bacterial activity and thatch decay

If you are unable to do this for whatever reason then collect the cores by raking with the back of a flat garden, landscapers or hay rake. They can then be smashed and used as a top dressing over the lawn, scattered in the borders or added to the compost heap. DON’T leave them on the lawn to ‘disappear’! They will not completely break down and as you walk or mow over them your lawn will get bumpy.

Brush Sand into the Holes?

I’m often asked about brushing sand into the holes after hollow tining the lawn. They do this on the golf green as part of their top dressing procedure. They also use a soil virtually identical to the original so that the profile remains uniform throughout. Further, they may have to do this several times at weekly intervals after hollow tining because the top dressing only partially fills the whole and needs 'topping up' over time as it settles.

On a typical lawn you will find it very difficult to get sand or soil to go down the holes; the remaining grass, moss and thatch can easily close over the entrance to the hole stopping the topdressing going in. Trust me; this is a lot harder than it sounds on anything other than a very close mown near flat lawn; and if the lawn or top dressing is anything other than bone dry it'll just stick at the top of the hole!

This is one of the more crazy ideas for a lawn which will cost you too much in material and effort for the dubious benefit that may be derived! Therefore, don’t bother with this unless your lawn needs top dressing for other reasons or you have an ornamental lawn and can add top dressing (possibly sterilised so no viable weed seeds!) that is a close match to your own soil at frequent intervals. See Soil & Lawn Top Dressing

Hollow Tine Aerating TipsFrom left: Landscapers, Leaf, Dummy & Spring Tine Rakes

  • Whenever you use a hollow tine aerator make sure you mow the lawn close before hand. It’s the devil’s own job to collect or smash the cores in long grass!  
  • If you prefer to collect the cores get a ‘dummy rake’. This is just a flat blade on a stick and moves the cores without snagging in the grass - 3rd rake from left.
  • If you use the mower to smash the cores you’ll need long trousers, wellies and if your soil is clay a pair of goggles* won’t go amiss as it will get dusty. Shut the house windows as well if it’s breezy.
  • Finally, if you have used the mower now is the time to clean the air filter, a simple job with a bit of fairy liquid; then swap or sharpen the blade. They’re going to need doing anyway!
 
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