Are you using a touch of cal/mag? I've found it gets rid of that purpling in the leaves which from what I've gathered is either cold temperature or magnesium deficiencyim accordance to the rules on the @ViparSpectra Grower contest ill be posting some developing bud shots on this thread. more detailed journal under jjsripperrun
The braincake turns purple/black everytimeAre you using a touch of cal/mag? I've found it gets rid of that purpling in the leaves which from what I've gathered is either cold temperature or magnesium deficiency