@XavCC 鈥 will be determined in several months. lichens grow ultra slowly, if they will under these circumstances at all. I want to install a fixed Pi camera to make a photo every day. I guess in summer or autumn one can determine whether to continue or abort the experiment :)

Around 1mm or 10mm per years ;-)

I am curious about your recipe for the growing medium

@XavCC for now just distilled water and xylitol. there are venturesome recipes out there, including anything from milk to fertiliser, yeast, ... but since I don't own a garden and this is inside my studio, I prefer to start with something that is hopefully less prone to stink and growing "anything" else than lichens (like mould, mushrooms, moss)

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