Fungi grow where light-weight falls and small penetration resistance prevails. Since light-weight also falls on the edges in the cake, fungi can grow there likewise. This is hard to avoid. We are likely to discourage darkening the perimeters with the grow box, as it's additional destructive effects than positive kinds. https://zanderomlew.blogaritma.com/26288305/not-known-details-about-golden-teacher-grow-kit