Pre-mix my medium before transplant?

What's up fellow enthusiasts, im about 2 weeks away from transplanting, my medium will consist of coco coir ( that will be washed and buffed with calmag) perlite, and worm castings, now here's my question, should I get this mix together now and let sit for 2 weeks, or is it cool to just mix the day of transplant, thanks in advance

Mix the day of transplant.........no reason to mix it 2 weeks before you need it.

MickFoster said:

Mix the day of transplant.........no reason to mix it 2 weeks before you need it.

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Thank u very much