The jars should be stored at 21-27°C (70-81°F), the warmer the better, but not exceeding 27°C. If you don't have these temperatures at home you can build an incubator to accommodate the jars.
Providing the jars are kept warm you should see the first sign of germination after 3-5 days as bright white specks. This is mycelium. If anything grows that is not white, for instance green, black or pink, then the jars are contaminated and their content must be discarded and your clean procedures need some improvement. After the jars are emptied and the jar is washed with detergent and hot water it can be used again.
Depending on the temperature and the viability of the spore syringe it takes 14-28 days for the mycelium to colonize the whole jar. Once colonized store the jars at normal room temperature, about 21°C (70°F) to initiate pinning.
Don't expose the jars to direct sunlight. Indirect sunlight (= the natural light that lights up a room because at day time out) or a low wattage lamp (cool white fluorescent lamp is ideal, incandescent lamp is less suitable) for 4-12 hours a day is sufficient.
Within 5-10 days (with certain mushroom strains it can however take up to 30 days) pinhead-size accumulations of mycelium should form. These so called pins represent the beginning of mushroom growth. In the following days also small mushrooms with brown heads become visible. When this is the case it's time to birth the cake into the fruiting container where the mushrooms can develop to maturity. Some strains don't easily develop pins. In this case put the colonized jar wrapped in a plastic bag in the fridge over night and then proceed to fruiting next day, even if the cake doesn't show pins yet. This cold shocking usually helps trigger pinning somewhat.
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