tree frog said:

I've had them take four weeks to pin, and as little as nine days with AIO grows.

My strategy is to let the casing get well colonized before fruiting.  It should look like this.



I've also had them sit after a second flush without contamination.

I imagine if you're getting trich before they flush, it's your spawn or possibly your substrate.  Unless you're waiting longer than four weeks.

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thanks for the feedback!
What are AIO grows?
Hmmm I introduced more fae after casing but the substrate was fully colonized for nearly 2 weeks to consolidate. Then it sit there for 6 weeks looking promising and on the 7th it triched out

tree frog said:

All in one jars or bags (substrate and seed basically).

Seven is a long time.  What temperature are they at?  I fruit mine in the low to mid 70s (mostly mid 70s).  They seem pretty temperature dependent, from the ones I've seen pop up in my compost.

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Oh wow do these fruit well?

I see. My temps are usually low on the 19C/66 farenheit, maybe that is the issue