You can buy a complete mushroom kit with instructions that will give you an exact time frame for picking your mushroomsOr you can choose to estimate depending on the conditions the mushrooms grow under...
Quick Facts To Help You Know When To Harvest Oyster Mushrooms
1. Darkening At The Edges Of The Gills And Caps – avoid getting the edges too dark by harvesting at the right time.
2. Drying Out Or Hardening – This oyster mushroom has been left to grow for a longer time than the others. It should have been harvested sooner before it gets this dry.