The generation of the truffle depends on the rain but above all on the influence of the moon in the growing phase, before it reaches the full moon you can find more truffles.
They say: “make the moon again, let’s go for truffles”
“Already in 1974 I marked the lunar cycles and I have a historical memory of the truffle, of course you get there with experience but it is a scientific certainty that the moon affects the birth and growth of the truffle.”