Knowing how plantation management affects the yield of edible mycorrhizal fungi (EMF) is both a new and complex issue. We are virtually inexperienced compared to most other horticultural sectors. EMF production also relies on the symbiotic interaction with host trees. The variable success obtained with truffle cultivation worldwide speaks for itself: a true cultivation remains to be invented. The current lack of knowledge is also a great research opportunity: so much can be learned if only we invest in it. Since no research work has yet addressed this question on truffles, I will present the monitoring of the yield of a mycorrhizal mushroom: saffron milk cap.