If you have a composting place in the garden and use it regularly, you probably have the best soil far and wide. Composting often has the problem that you do not know when the compost is ready and can be used. But you can find out by a simple test. Take a small sample from the compost and fill it into a bowl or a flowerpot. Now sprinkle cress seeds on it. You should check your sample after about five days.
What do the plants look like?
If the plants are strong and green, then the compost is of exactly the right quality. If, on the other hand, the plants take care and are yellow instead of green, then the compost is not ready yet. This indicates undigested nutrients. Either you should let it rest further or you can use it for vigorous vegetables, but never for young plants, because otherwise they will not thrive as you imagine. You should also shift the compost from time to time.