If the lawn has become a moss carpet, iron sulfate is usually recommended to combat it. The iron sulfate is added to the fertilizer on the lawn and destroys the moss there. However, the use of iron sulfate against moss is not entirely safe.
Use iron sulfate against moss
Iron sulfate is widely regarded as “the remedy” against moss in the lawn. In fact, iron sulphate causes the moss to die off and prevents new areas of moss from forming.
However, the garden owner should be aware that iron sulphate, while not directly toxic, is corrosive. Other plants next to the lawn can be damaged as a result. Applying iron sulfate against moss is not necessarily the best solution for the soil either.
Only suitable for lawns
With iron sulfate, you can only get rid of moss in the lawn. The agent is not suitable for other areas of application such as moss on walls, exposed aggregate concrete slabs, roofs or garden furniture.
These materials would be etched by the iron sulfate and become stained and attractive.
How to apply iron sulfate against moss
- Application in spring
- wait for damp weather
- alternatively, sprinkle the lawn beforehand
- Dissolve iron sulfate in the irrigation water
- Treat the lawn evenly
- alternatively use solid salt
- sprinkle evenly
- Then water the lawn
- Do not step on the lawn for at least two days
- Keep pets and children away
- Then rake off dead moss
In the case of very heavily infested lawns, you should first pull a large part of the moss out of the ground with the rake.
A second application in August or September is possible with very heavy moss infestation.
Alternatives to combating moss in the lawn
Prevention is better than fighting
This includes regular fertilization. The soil should be well loose so that no waterlogging can occur. In summer, if possible, only spray until noon, then the lawn can dry off better by evening.
Mow the lawn regularly. The length of the grass should be kept a little longer on shady areas than on sunny areas.
Precautions when using iron sulfate
Iron sulfate is corrosive. This means that you have to make sure that neither liquid nor salts get directly on the bare skin or even in the eyes. Wearing protective goggles is just as advisable as putting on gloves that are resistant to chemicals.
Calcium cyanamide is a good prevention against moss in the lawn. The fertilizer ensures dense green lawns in which there is no room for moss.