What do yellow spots on the lawn mean after fertilizing?

In most cases, this is a clear sign that the lawn is under-fertilized or receiving nutrients unevenly.

Possible causes

• The fertilizer was not spread evenly

• Overall, not enough fertilizer was applied

• The lawn is severely malnourished

• There is soil compaction or waterlogging in some areas

• The lawn was over-fertilized (no more than 20 g/m² should be applied)

What can be done about it?

• If the soil is waterlogged, loosen or aerate it

• Mechanically break up existing compaction

• If you over-fertilize, water the lawn thoroughly to flush out excess nutrients

• If the soil is underfertilized, apply additional fertilizer, using a smaller amount (approx. 10 g/m²).

It is important to achieve an even distribution. A precise spreader is best suited for this purpose, as it can cover even small areas cleanly and evenly.

The lawn should be thoroughly watered after each application of fertilizer. Ideally, apply the fertilizer just before a forecast rain shower.

If you follow these steps, the spots will usually disappear after a short time, and the lawn will once again become an even, lush green surface.