Facing periods of intense heat and drought this past summer, many gardens display a lawn that has turned yellow, become sparse, and whose soil has become heavily compacted.
First, be patient
After such heat, autumn is the ideal time to begin restoring your lawn. With cooler temperatures, a gradual return of moisture, and soil that still holds some of the season’s warmth, the grass has the right setting to regenerate. However, professionals recommend avoiding haste and following a structured approach to ensure a lasting recovery.
The professional guideline is moderation first: give the vegetation time to regain its natural vigor. Before bringing out the mower or planning heavy work, wait for the first rains and the nightly dew to do their job. Letting the grass regrow initially allows you to evaluate the lawn’s resilience and to precisely identify dead areas or truly sparse patches.
Aerate the compacted areas of your lawn
After such a dry summer, a thatch layer made up of plant debris and dead stems accumulates beneath the surface. This thatch forms a waterproof barrier that blocks the penetration of water, air, and nutrients. The first technical step is therefore to scarify or rake the lawn carefully to remove these organic wastes, to let light reach the living blades, and to restart the biological activity essential to soil health.
Under the influence of heat and repeated traffic, the soil eventually becomes heavily compacted. To check whether the soil is too dense, the “pencil test” involves trying to push a small tool into it: if it cannot penetrate, aeration is imperative. Using a fork, a cultivator, or an aerator to pierce the top layer helps to reestablish gas exchange and promote the movement of water down to the root system.
Sow seed and fertilize the soil
Once the soil is cleaned and decompacted, you’ll need to fill the gaps and densify the vegetative cover. Autumn is the best season for overseeding, with a choice of seed varieties suited to sun exposure or the uses of the land. To support this growth, a modest input of nutrients (nitrogen, phosphorus, potassium) or organic amendments like compost is recommended to feed the soil without overloading it.
Then, the resumption of mowing should be gradual, adjusting the mowing height to be higher than usual so as not to stress the young shoots or expose bare soil. Experts also advise practicing mulching, leaving the finely cut grass on site. Deposited in a thin layer, this organic matter protects the soil from drying out, preserves moisture, and returns valuable nutrients as it decomposes.
