Weeds on the Lawn

But not all weeds are harmful. For example, creeping clover grows in patches and creates color variation, making it acceptable on meadows but inappropriate on formal lawns. For sports lawns, it's strictly prohibited due to practical reasons: the turf becomes uncomfortable for play.

Where do they come from?

Many lawn owners are surprised: they chose a good grass variety, the soil is excellent, and maintenance is regular — yet weeds keep appearing. Where do they come from?

First source: soil. It contains a large reserve of seeds. If weeds didn’t appear in the first two years, but suddenly emerge later, it’s not surprising. Many seeds have long dormancy periods (sometimes up to a decade) and remain inactive until favorable conditions trigger germination.

Second source: manure and other organic fertilizers. If not properly composted, they can introduce weeds into your lawn.

Sometimes weed seeds are present in the seed mix itself — a matter of manufacturer reliability.

Overall, the list of causes for weed infestation is quite extensive. These include:

Wind-borne seed dispersal;
Seeds carried by bird droppings;
Roots, seeds, and stem fragments transported by animals (on fur) or people (on shoe soles, trouser hems);
Roots, seeds, and stem pieces left behind after lawn mowing;
Earthworms can bring weed seeds to the surface.

Why fight weeds on the lawn?

The damage caused by weeds is obvious and visible: uneven color, grayish-brown patches give a neglected appearance and suggest poor maintenance.

But the harm goes beyond aesthetics. Weeds are more adaptable, resilient, and low-maintenance than cultivated grasses. In competition for sunlight, nutrients, and water, they often dominate. They not only displace lawn grasses but also deplete soil moisture and create favorable conditions for disease pathogens and pests.

Preventing weed infestation on lawns

As the saying goes, prevention is better than cure. This applies equally to lawn weeds.

The first preventive measure is site preparation: before seeding, leave the area fallow. This means tilling the soil and cultivating it several times during the summer. Each tilling brings new seeds to the surface, where they germinate. These young weeds must be removed immediately. If done properly, annual weeds will not overtake the lawn.

Established lawns also require consistent care to maintain resistance. The goal is to prevent weak spots where weeds can establish and to ensure proper maintenance for a dense, healthy turf.

Key lawn care practices:

Proper mowing: Maintain a consistent height and frequency. Frequent changes weaken grass and open the way for weeds.
Correct watering: Inadequate watering dries the soil, weakening lawn grasses and allowing weeds to dominate after rain or irrigation.
Proper fertilization: Weeds will also feed, but cultivated grasses will strengthen, spread more vigorously, and outcompete existing weeds.
Regular raking: Clearing the lawn surface with rakes helps prevent creeping weeds and strengthens grass by breaking up the mossy layer that forms on topsoil. Avoid overdoing it to prevent damage to the turf.
Controlling earthworms: Effective products are widely available. Some argue earthworms improve soil, which is true — but they also bring buried weed seeds to the surface. Their castings also provide ideal habitats for wind- or bird-carried seeds.
Managing lawn diseases: Disease often causes bare patches with weak or dead grass, creating ideal conditions for weeds or moss. Prevent disease if possible; if not, reseed or lay new turf immediately to prevent weeds from taking hold.

How to control weeds on the lawn

If weeds were removed and the site properly prepared at installation, major infestations shouldn’t occur. Some will still appear, but regular mowing prevents their spread. This applies especially to nettles, bindweed, couch grass, mallow, bird’s-foot trefoil, plantain, dandelion, and ground elder.

Some weeds must be pulled by hand. Best done on firm soil, carefully pulling out weeds while protecting surrounding grass. Do it while weeds are still small — removing them later becomes difficult.

If weeds are widespread, chemical control may be necessary. However, avoid using selective herbicides on young lawns — they should only be applied after at least one year of growth.

On lawns with established, continuous turf, use knife-lifters to remove weeds. First, determine the depth of the root buds, then cut precisely at that level to prevent regrowth. Otherwise, the weed will only be weakened, not killed. In worst cases, cutting the top buds may stimulate lateral bud growth, worsening the infestation.

For common weeds, proven methods exist:

Remove perennial daisies by the root and fertilize the lawn;
Remove sow thistle, borage, thistle, and common starwort, and mow regularly;
Remove hawkweed and creeping buttercup by the root, fertilize, and aerate the lawn;
Remove plantain by the root;
Remove yarrow by the root and lime the lawn;
Remove creeping, meadow, and questionable clover by hand and mow regularly;
Remove veronica, fertilize, and mow regularly;
Controlling creeping couch grass is extremely difficult; reseeding may be necessary.