I don't cold crash, but if I did I would cold crash first, to drop out the yeast or whatever you're cold crashing for, bring it to room temperature, then add the dryhops for 5-7 days and then package.
Dryhops seem to hold the aroma best if done right before packaging. Dryhopping takes longer at cold temperatures than warm temperatures, so I either dryhop in the keg at 40 degrees for the entire time, or dryhop at 68 degrees for about 5 days.
Broken Leg Brewery
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