Scarifying once or twice a year depends on the condition of your turf and the desired result. Based on the size of your area you can decide whether to do it with hand tools or it is best to use a professional machine. To ensure the best results possible you can aid the process by feeding your lawn afterwards for a strong recovery. During growing season grass can bounce back to an even better state than before. The perfect time for scarifying has specific weather conditions you must look out for – not too cold, too hot, nor too dry. You must time your treatment accordingly as scarifying will leave your soil exposed and vulnerable to the growth of weeds and other unwanted seeds. Light scarification or removing the thatch can be done in spring, around the month of April, when it’s getting warmer. In spring the growth and recovery rate of your lawn, and all your plants, is the highest. If you miss your chance in April another good opportunity for light scarifying would be early autumn – late August, early September. It is of utmost importance to not delay it further than that as you would want it done before the temperatures drop too much.
By regularly aerating your turf you will also allow water to enter it more easily. This plays great importance in the hotter seasons as when the weather is dry, the grassroots will require a bigger intake of water as a lot of it will evaporate or transpire through their leaves. If your grass is letting out more water than it’s intaking it will begin to turn brown and may even eventually die.
However, by thoroughly aerating an area where browning has occurred, you can restore to roots’ ability to intake moisture again. And if done right your grass’ colour will return to its regular green in just around a week.
On the other hand, if the lawn is not aerated during the cold rainy seasons such as autumn and winter completely different problems can occur. For example, your soil might experience surface sealing because of the compacting effect of walking around and using garden maintenance machines that are on the heavier side.
This can prevent water from entering the soil, in turn remaining on the surface and also restrict gaseous exchange. In the long run, this can lead to moss and fibrous growth build up. If nothing is done to relieve the soil compaction, no water or air will be able to reach the grassroots, creating the ideal conditions for diseases to thrive.
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