I built a large propagator to overwinter plants and use next year to harden off.
i occasionally open the lids if weather permits.
Today I lifted a few things around in there and found a lot of mould beneath the pots and trays.
the lids are wooden frames with something a bit more substantial than fleece. More nylon I would say but not too thick. Has this happened because there is a lack of ventilation? everything is sitting on a good layer of grit.
i gave it a good rake and left the plants out all day but they're back in now. Will the plants be okay and can I prevent this by more ventilation or moving everything around. I would have thought the materials I have used would have been ideal to let water through and help ventilation. Jings, crivvens, he'll ma boab. far too many plants in there too loose.