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If thatch dominates the lawn, it is high time to renew the lawn. Thatch has a negative impact on grass growth and impairs the air and water balance in the soil. A lawn renovation also works without digging.
Scarifying replaces digging
1. Preparations
Mow the lawn to about four centimeters and then apply fertilizer to the entire area. The supply of nutrients strengthens the lawn and makes it more resistant to the forthcoming care measures. If the temperature is humid and warm, the old lawn will thrive within the next two weeks, so you can start resurfacing.
2. Mow
Use a petrol lawnmower as it can do more than an electric lawnmower. Set the device to the lowest level and mow the lawn completely.
3. Scarify
By scarifying you remove the old thatch, moss and weeds from the area. This measure promotes air circulation and improves the water balance in the soil.
Unlike conventional scarifying, you set the blades so deep that they cut into the ground for a few millimeters. Your instincts are required here, because the knives wear out quickly. Depending on the type of lawn and the degree of matting, you will tear more or less biomass out of the ground with this step.
Drive over the lawn with the scarifier (€84.00) completely in longitudinal lanes and then in transverse rows. Repeat this step if there are still large weed nests in the lawn. Thoroughly remove the residue from the lawn.
4. Level out any unevenness
If the lawn is uneven, apply a thin layer of sandy topsoil. The layer should not exceed a height of ten millimeters.
5. Overseeding
There are special seed mixtures that are suitable for lawn renovation. The seed should be distributed evenly and without gaps over the entire area. Sowing is possible by hand. A spreader offers a convenient alternative.
6. Fertilize
A lawn fertilizer provides nutrients for the seeds to grow. Look for a high proportion of phosphorus and nitrogen. Mature compost is ideal, as it also protects the soil from drying out. The compost layer should not be thicker than five millimeters.
7. Watering
In order for the seeds to have optimal soil contact, you must water the entire area thoroughly. The lawn must not dry out in the coming weeks. Water again as soon as the substrate turns light brown on the surface.
Tips and things worth knowing
Spring is the ideal time for lawn renewal to allow the lawn to regenerate under mild temperature conditions. May is the period of strongest growth, when the lawn can recover most quickly from the damage caused by scarifying. By restoring your lawn in this way, you save life in the deeper layers of soil. They prevent the structure from being completely rearranged.