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One question, how long is my lime going to last in my casings before the pH is lowered? I'm using hydrated lime which I know is more potent and faster acting than ground limestone or mixed lime but how long do each of these last before the casing can no longer produce a desireable yield of mushrooms?
The strain in which I am cultivating is B+ p. cebensis. Using the 50/50 tek and hydrated lime. Thank you to all that reply.
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The only reason you add lime to raise the pH is because trichoderma perfers low pH. The casing layer will get more acidic as time goes on, but that doesn't mean you're going to get trichoderma, just that you're slightly more likely to. Most casings will do about 3 flushes before they need to be retired.
Okay, again, like many thing thsi is a basic cultivation question, not advanced, but ignoring that the ph of peat need to be adjusted as it is to alkaline for the mycelium to thrive. Your substrate should already have a good nutrient and moisture reserve so if the casing layer is not a relatively inviting place then the mycelium will not grow properly throguh it. Oh, it may grow into it, but not in the intended manner. Peopel seem to only have a loose understanding of the function of the casing layer. To remedy that I would suggest purchasing The Mushroom Cultivator which has a wonderful chapter dealing with the casing layer.
Also, if you're worried about your lime buffer being "used up" before your trays nutrient supply then use chalk instead which will provide a much longer lasting buffer.
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