There are different values that you can use as a guide.
Very simple and easy to see:
when the lawn starts to grow again in spring. Now it can also absorb nutrients again, from now on it can be fertilized.
For all those who like to calculate:
An orientation value is the so-called heat sum. This means that all daily average temperatures from January onwards are added together, and as soon as the total exceeds "150", fertilizing can begin.
When you see that the forsythia or daffodils are in bloom, you can also get started.
We recommend using the first Fertilization in March. Lawn lime Again, four weeks before the first fertilization with turbo green Slow-release lawn fertilizer / spring lawn fertilizer be applied.