This is a question that we get asked often at planting and during major interventions in cultivating truffle, such as working the soil trimming. Indeed, we know that the moon affects plants and creatures living in general. The “old generations”, keen observers of nature, would speak of it better than us. If known, respect the cycle of the moon. But for us, the best rule is to apply treatment in the best possible conditions, starting with planting on well prepared ground, not frozen, and in good time.