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Fungi in the lawn: What are the causes and what you can do to combat the problem

You have actually devoted ample time and care to your lawn, but still you suddenly sight mushroom screens here and there? However, a fungal infestation does not have to be obvious. Brown spots in the middle of the grass can also be a sign. Either way, it’s annoying after all the effort, of course, but a fungal infestation is ultimately an indication that something is wrong with the lawn. We would like to tell you the causes of fungus in the lawn, what remedies you can use against it and how you can prevent it in the future.

Why do fungi grow in the lawn?

Fighting brown fungi in the lawn

First of all, it should be said that a fungus requires very specific conditions in order to grow. Under normal circumstances, these are not present on the home lawn, or at least you should not be:

  • high humidity
  • Lack of nutrients

High soil moisture usually occurs in late summer. Then there is increased rainfall, which worsens the situation due to an additional impermeable soil. If this is compounded by a shady area that dries more slowly, it’s just perfect for fungus to spread. Fungi in the lawn may also indicate that the soil is lacking in nutrients, as they prefer such soils.

How do they get into the garden?

On the one hand, they can be transferred through wood, for example, if there was dead wood in the compost or soil used, or if you sawed off trees at the edge of the lawn and left the stumps there. On the other hand, fungal spores are also transmitted through shoes or other materials we have used in the garden and even through the air. In such cases, you are not to blame, but you should still try not to provide ideal conditions for fungi to grow from now on.

Common fungal symptoms

Get rid of witch rings in the grass with simple means

So, lawn fungi can grow both above ground with fruiting bodies, and underground and invisible. It depends on the type of fungus. If you are only underground, the infestation can still be seen by stains and other changes to the turf. Mushrooms in the lawn can be poisonous, but they can also be edible. If you are not a good connoisseur, it is better to leave the traffic. However, you can also consult an expert to know if the mushrooms in the lawn are edible.

Witch rings in the lawn

The so-called witch rings can grow both above and below ground. In this case, they form a network that appears circular on the surface.

Small white mushrooms in the lawn

The edible meadow mushroom has a white color, but so do the deadly poisonous white and green tuberous-leaf mushrooms. Field funnel mushrooms also have a white color as well as the giant umbrella mushroom, but later it also gets brown spots.

Small white mushrooms in the lawn poisonous or edible

Determine mushrooms in the lawn – Small brown mushrooms in the lawn.

If the mushroom in the grass is brown in color, it is often the so-called clove swallow, but Hallimasch mushrooms can also be found.

Black fungi in the lawn

For example, the thin-shelled potato bovist, the blackened sapling, the dotted-spored fertilizer mushroom, the black-blue bald, the small crested tintling and the black-blue redbud have a black color. Some of them are edible, others dangerously poisonous.

Black mushrooms in the lawn can be dangerous, but also suitable for consumption


Remedies for fungi in the lawn

What can you do about fungi in your lawn? Well, one way would be to mow the lawn more often. In this way, you will also cut off the fungi, which will eventually die as a result. However, keep in mind that this way you can also spread the fungal spores further. For this reason, before mowing, it is advisable to cut out and dispose of any fungus ( not on the compost!).

Furthermore, you can combat fungi in the lawn by making life difficult for them, i.e. by not creating good growing conditions for them or by depriving them of them:

  • Avoid waterlogging by regularly scarifying and removing moss and felt. This, together with pricking with a special fork, improves aeration. Clippings also retain moisture and should always be disposed of rather than left on the lawn.
  • Fertilize regularly with slow-release fertilizer containing nitrogen, phosphorus and potassium, because the fungus does not like nutrient-rich soil at all.
  • Avoid acidic soils, in which fungi prefer to grow. Liming the lawn is effective in this case.

What home remedies are suitable for spot treatment?

Simple home remedies against lawn fungus - avoid waterlogging and ensure good ventilation

The effectiveness is controversial. However, if you want to try home remedies against fungi in the lawn, you can do it in addition to the above-mentioned maintenance measures. However, prick them out beforehand to act only against the remaining spores. What helps against fungi in the lawn? You can, for example:

  • Use sodium bicarbonate against fungi in the lawn, because this home remedy is supposed to work against both powdery mildew (a fungal disease), and weeds. Thus, there is a chance that the remedy will also eliminate these fungal spores. To do this, mix two teaspoons of baking soda with a liter of water and regularly water or spray the fungi.
  • Remove fungus in the lawn with salt and vinegar, which you mix with water and then use to water the affected areas.
  • administer to the affected lawn watering water that you have enriched with spirit or, alternatively, with potash soap. This will improve the nutrient uptake of the lawn, making it stronger.

Fungicides against fungi in the lawn

A lack of nutrients favors the spread of fungi in the grass


Before you chemically fight fungi in the lawn, it is important to know that this is prohibited. Since you would harm the environment and also weaken your ornamental lawn, you should rather use the above-mentioned means and tips to get rid of fungi in the grass.